JP7268680B2 - Communication control device and communication control method - Google Patents

Description

The present disclosure relates to a communication control device and a communication control method.

The problem of depletion of radio resources (radio resources) that can be allocated to radio systems (radio devices) has surfaced. Since all radio bands are already used by existing radio systems (radio devices), it is difficult to allocate radio resources to new radio systems. Therefore, in recent years, more effective use of radio wave resources by utilizing cognitive radio technology has begun to attract attention. Cognitive radio technology creates radio wave resources by using the temporal and spatial empty radio waves (white space) of existing radio systems.

Japanese Patent No. 5768812

However, simply using idle radio waves does not always lead to effective use of radio wave resources. For example, in order to effectively use radio wave resources, it is necessary to efficiently distribute available radio waves to multiple wireless systems (wireless devices). Distributing radio waves is not easy.

Therefore, the present disclosure proposes a communication control apparatus and a communication control method that can realize effective use of radio wave resources.

In order to solve the above problems, a communication control device according to one aspect of the present disclosure acquires information of a plurality of second wireless systems that wirelessly communicate using radio waves in a frequency band used by a first wireless system. a first determining, based on the information of the plurality of second radio systems, an operating parameter regarding radio wave transmission of each of the plurality of second radio systems so as to satisfy a protection standard regarding radio wave interference of the first radio system; and a calculating unit for calculating a residual interference amount that can be additionally allocated to the second radio system based on the operating parameter and the protection criterion of the first radio system determined by the first deciding unit, and a plurality of A classification unit that classifies the second radio system into one or more sets, and an adjustment amount of the operation parameter of the second radio system that belongs to a predetermined set out of the one or more sets based on residual interference amount information. and a second decision unit for deciding.

According to the present disclosure, it is possible to realize effective utilization of radio wave resources. Note that the effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.

FIG. 4 is an explanatory diagram showing an example of allocation of interference margins to each communication device that configures a secondary system; It is an explanatory view showing a hierarchical structure in CBRS. FIG. 2 is an explanatory diagram showing bands of CBRS; 1 is a diagram illustrating a configuration example of a communication system according to an embodiment of the present disclosure; FIG. 1 is a diagram illustrating a configuration example of a communication device according to an embodiment of the present disclosure; FIG. 1 is a diagram illustrating a configuration example of a terminal device according to an embodiment of the present disclosure; FIG. 1 is a diagram illustrating a configuration example of a communication control device according to an embodiment of the present disclosure; FIG. FIG. 3 is an explanatory diagram showing an example of an interference model assumed in this embodiment; FIG. 4 is an explanatory diagram showing another example of an interference model assumed in this embodiment; FIG. 4 is an explanatory diagram for explaining a residual interference margin generated in a communication system; FIG. 4 is a sequence diagram showing an example of communication control processing according to an embodiment of the present disclosure; FIG. 4 is an explanatory diagram for explaining a mutual interference group; 6 is a flowchart illustrating an example of adjustment processing according to an embodiment of the present disclosure; 4 is a flowchart illustrating an example of allocation processing according to an embodiment of the present disclosure; 6 is a flowchart illustrating an example of determination processing according to an embodiment of the present disclosure; 1 is a diagram illustrating a configuration example of a communication system according to an embodiment of the present disclosure; FIG. 1 is a diagram illustrating a configuration example of a communication system 2 according to an embodiment of the present disclosure; FIG.

Embodiments of the present disclosure will be described in detail below with reference to the drawings. In addition, in each of the following embodiments, the same parts are denoted by the same reference numerals, thereby omitting redundant explanations.

In addition, in this specification and drawings, a plurality of components having substantially the same functional configuration may be distinguished by attaching different numerals after the same reference numerals. For example, a plurality of configurations having substantially the same functional configurations are distinguished as communication control devices 40 ₁ and 40 ₂ as necessary. However, when there is no particular need to distinguish between a plurality of constituent elements having substantially the same functional configuration, only the same reference numerals are used. For example, the communication control devices 40 ₁ and 40 ₂ are simply referred to as the communication control device 40 when there is no particular need to distinguish between them.

Also, the present disclosure will be described according to the order of items shown below.
1. Introduction 2. Configuration of communication system 2-1. Overall Configuration of Communication System 2-2. Configuration of communication device 2-3. Configuration of terminal device 2-4. Configuration of communication control device 3 . Residual Interference Margin 3-1. Interference model 3-2. Calculation example of residual interference margin4. Operation of communication system 4-1. Communication control processing 4-2. Example of adjustment processing 4-3. Example of allocation process 4-4. An example of decision processing5. Modification 5-1. Further information exchange between communication control devices 5-2. Collision Avoidance of Judgment Results Between Communication Control Devices 5-3. Interference with primary system to be considered 5-4. Including communication devices that interfere with a plurality of primary systems 5-5. When Communication Device Belongs to Multiple Mutual Interference Groups 5-6. Modified example of system configuration 5-7. Other Modifications6. Conclusion

<<1. Introduction>>
In recent years, the problem of depletion of radio wave resources (for example, frequencies) that can be allocated to wireless systems has surfaced. However, since all radio bands are already used by existing wireless systems, new radio resource allocation is difficult. Therefore, in recent years, more effective use of radio wave resources by utilizing cognitive radio technology has begun to attract attention.

Cognitive radio technology creates radio wave resources by utilizing (for example, dynamic frequency sharing (DSA: Dynamic Spectrum Access)) the temporally and spatially empty radio waves (White Space) of existing radio systems. For example, in the United States, CBRS ( Citizens Broadband Radio Service) legislation and standardization are accelerating.

Cognitive radio technology contributes not only to dynamic frequency sharing, but also to improving the frequency utilization efficiency of radio systems. For example, ETSI EN 303 387 and IEEE 802.19.1-2014 stipulate coexistence technology between wireless systems using idle radio waves.

In order to realize frequency sharing, it is important that a communication control device (for example, a frequency management database) controls communication of the secondary system so as not to give fatal interference to the primary system. A communication control device is a device that manages communication and the like of a communication device. For example, the communication control device is a device (system) for managing radio resources (for example, frequencies) such as GLDB (Geo-location Database) and SAS (Spectrum Access System). In this embodiment, the communication control device corresponds to a communication control device 40 (for example, communication control devices 40 ₁ and 40 ₂ shown in FIG. 4), which will be described later. The communication control device 40 will be detailed later.

Here, the primary system is, for example, a system (for example, an existing system) that preferentially uses radio waves in a predetermined frequency band over other systems such as a secondary system. The secondary system is, for example, a system that makes secondary use (for example, dynamic frequency sharing) of radio waves in the frequency band used by the primary system. Each of the primary system and the secondary system may be composed of a plurality of communication devices, or may be composed of a single communication device. The communication control device sets 1 so that the accumulation of interference (Interference Aggregation) with respect to the primary system of one or more communication devices constituting the secondary system does not exceed the allowable amount of interference (also referred to as interference margin) of the primary system. Or distribute the interference allowance to a plurality of communication devices. At this time, the allowable amount of interference may be an amount of interference predetermined by an operator of the primary system or a public institution that manages radio waves. In the following description, the term "interference margin" refers to the allowable amount of interference. Also, the accumulation of interference may be referred to as accumulated interference power.

FIG. 1 is an explanatory diagram showing an example of interference margin allocation to each communication device that configures a secondary system. In the example of FIG. 1, the communication system 1 is the primary system and the communication system 2 is the secondary system. The communication system 1 includes a communication device ₁₀₁ and the like. The communication system 2 also includes communication devices 20 ₁ , 20 ₂ , 20 ₃ and the like. Although the communication system 1 includes only one communication device 10 in the example of FIG. 1, the communication device 10 may include a plurality of communication devices. Moreover, although the communication system 2 includes three communication devices 20 in the example of FIG. In the example of FIG. 1, only one primary system (communication system 1 in the example of FIG. 1) and one secondary system (communication system 2 in the example of FIG. 1) are shown. There may be a plurality of each.

The communication device 10 ₁ and the communication devices 20 ₁ , 20 ₂ and 20 ₃ are each capable of transmitting and receiving radio waves. The amount of interference that the communication device ₁₀₁ allows is I _accept . The amounts of interference given by the communication devices 20 ₁ , 20 ₂ and 20 ₃ to the predetermined protection point of the communication system 1 (primary system) are the amounts of interference I ₁ , I ₂ and I ₃ respectively. Here, the protection point is an interference calculation reference point for protecting the communication system 1 .

The communication control device controls the plurality of communication devices 20 so that the cumulative interference (received interference amount I ₁ +I ₂ +I ₃ shown in FIG. 1) to a predetermined protection point of the communication system 1 does not exceed the interference margin I _accept . Allocate the interference margin I _accept . For example, the communication control apparatus distributes the interference margin I _accept to each communication apparatus 20 so that the amounts of interference I ₁ , I ₂ , and I ₃ each become I _accept /3. Alternatively, the communication control apparatus distributes the interference margin I _accept to each communication apparatus 20 such that the amounts of interference I ₁ , I ₂ , and I ₃ are less than I _accept /3. Of course, the interference margin allocation method is not limited to this example.

The communication control apparatus calculates the maximum transmission power allowed for each communication apparatus 20 (hereinafter referred to as maximum allowable transmission power) based on the allocated interference amount (hereinafter referred to as allocated interference amount). For example, the communication control device calculates the maximum allowable transmission power of each communication device 20 by back-calculating from the distributed interference amount based on the propagation loss, antenna gain, and the like. Then, the communication control device notifies each communication device 20 of information on the calculated maximum allowable transmission power.

Even if each communication device 20 is notified of the maximum allowable transmission power information from the communication control device, it does not always apply the notified maximum allowable transmission power. For example, it is assumed that each communication device 20 does not apply the maximum allowable transmission power notified from the communication control device for the following reasons (R1) to (R4).

(R1) Due to hardware restrictions of the communication device 20, the communication device 20 can transmit radio waves only with transmission power less than the maximum allowable transmission power.
(R2) Although the maximum permissible transmission power can be applied to the communication device 20 due to hardware restrictions, the communication device 20 has passed a spectrum mask test (conducted by a public institution) when the maximum permissible transmission power is applied. do not have.
(R3) For convenience of network planning, the communication device 20 etc. operates communication with transmission power less than the maximum allowable transmission power.
(R4) Since the maximum allowable transmission power value desired by the communication device 20 could not be obtained, the radio wave transmission in the channel (for example, the frequency band used by the primary system) is abandoned.

In such a case, part or all of the interference amount allocated to the communication device 20 will be left over. For example, in the example of FIG. 1, assume that the communication apparatus ₂₀₃ cannot obtain the desired maximum transmission power and gives up radio wave transmission in the frequency band (channel) of the communication system 1 . In this case, of the interference margin I _accept , at least the interference amount corresponding to the applied interference amount I ₃ remains unused. In the following description, the remaining amount of interference is called a residual interference margin. The residual interference margin can be rephrased as the residual interference amount.

In the above example, the communication control device calculates the maximum allowable transmission power of each communication device 20 based on the distributed interference amount distributed to each communication device 20, and sends the calculated maximum allowable transmission power to each communication device 20. reported. However, as another approach, the communication device 20 may notify the communication control device of its own desired maximum transmission power (hereinafter referred to as desired maximum transmission power). In this case, after receiving information on the desired maximum transmission power from the communication device 20 , the communication control device calculates an estimated value of interference that may occur when the desired maximum transmission power is applied to the communication device 20 . Then, when the estimated interference value exceeds the allocated interference amount of the communication device 20 in question, the communication control device rejects the radio wave transmission at the desired maximum transmission power for the communication device 20 in question. At this time, the allocated interference amount allocated to the rejected communication device 20 can be part or all of the residual interference margin (residual interference amount).

If the communication device 20 can use the residual interference margin for wireless communication, radio wave resources can be used more effectively. For example, assume that the communication control device distributes the residual interference margin to some of the plurality of communication devices 20 . At this time, the communication device 20 to which the amount of interference has been distributed can perform radio wave transmission with a higher output. Then, the communication device 20 can communicate with terminal devices located far away, or communicate with more terminal devices at once. In this embodiment, the communication control device adjusts the operating parameters (for example, maximum transmission power) of the communication device 20 within the range of the residual interference margin, thereby enabling more effective use of radio resources.

In this embodiment, it is assumed that the primary system (communication system 1) and the secondary system (communication system 2) are in a shared frequency environment. An example of CBRS established by the FCC (Federal Communications Commission) in the United States will be described. FIG. 2 is an explanatory diagram showing a hierarchical structure in CBRS. CBRS defines a hierarchical structure consisting of an incumbent tier, a priority access tier, and a general authorized access tier. In this hierarchical structure, a priority access tier is positioned above the general authorized access tier (General Authorized Access Tier), and an existing tier (Incumbent Tier) is positioned above the priority access tier. Taking CBRS as an example, the system located in the existing stratum (existing system) is the primary system, and the system located in the general authorization access stratum and the priority access stratum is the secondary system.

FIG. 3 is an explanatory diagram showing bands of CBRS. Taking the above CBRS as an example, the primary system can be the Military Radar System, the Grandfathered Wireless System, or the Fixed Satellite Service (space-to-earth). )). Here, the military radar system is a shipboard radar. Also, the secondary system is a radio system called CBSD (Citizens Broadband Radio Service Device). There are further priorities for the secondary system, and a Priority Access License (PAL), which allows the use of shared bands, and a General Authorized Access (GAA), which is equivalent to license-free. ing. Layer 1 (Tier 1) shown in FIG. 3 corresponds to the existing layer shown in FIG. Also, the layer 2 (Tier 2) shown in FIG. 3 corresponds to the priority access layer shown in FIG. Also, the layer 3 (Tier 3) shown in FIG. 3 corresponds to the general authorization access layer shown in FIG.

The primary system (communication system 1) of this embodiment is not limited to the example shown in FIG. Other types of radio systems may be used as the primary system (communication system 1). For example, the primary system may be a television broadcasting system such as a DVB-T (Digital Video Broadcasting-Terrestrial) system. Also, the primary system may be a cellular communication system such as LTE (Long Term Evolution) or NR (New Radio). Also, the primary system may be an aeronautical radio system such as ARNS (Aeronautical Radio Navigation Service). Of course, the primary system is not limited to the above wireless system, and may be another type of wireless system.

Also, the white space used by the communication system 2 is not limited to the radio waves of the Federal use band (3.55-3.70 GHz). The communication system 2 may use radio waves in a frequency band different from the Federal use band (3.55-3.70 GHz) as idle radio waves. For example, if the primary system (communication system 1) is a television broadcasting system, the communication system 2 may be a system that uses TV white space as idle radio waves. Here, the TV white space means a frequency band not used by the television broadcasting system among the frequency channels assigned to the television broadcasting system (primary system). At this time, the TV white space may be a channel that is not used according to the area.

Further, the relationship between the communication system 1 and the communication system 2 is not limited to a frequency sharing relationship in which the communication system 1 is the primary system and the communication system 2 is the secondary system. The relationship between communication system 1 and communication system 2 may be a network coexistence relationship between the same or different wireless systems using the same frequency.

<<2. Configuration of communication system>>
A communication system 2 according to an embodiment of the present disclosure will be described below. The communication system 2 is a radio communication system that performs radio communication by secondary use of radio waves used by the communication system 1 (first radio system). For example, the communication system 2 is a wireless communication system that performs dynamic frequency sharing of idle radio waves of the communication system 1 . The communication system 2 uses a predetermined radio access technology to provide wireless services to users or devices owned by users.

Here, the communication system 2 may be a cellular communication system such as W-CDMA (Wideband Code Division Multiple Access), cdma2000 (Code Division Multiple Access 2000), LTE, and NR. In the following description, "LTE" includes LTE-A (LTE-Advanced), LTE-A Pro (LTE-Advanced Pro), and EUTRA (Evolved Universal Terrestrial Radio Access). "NR" includes NRAT (New Radio Access Technology) and FEUTRA (Further EUTRA). Note that the communication system 2 is not limited to a cellular communication system. For example, the communication system 2 may be another wireless communication system such as a wireless LAN (Local Area Network) system, television broadcasting system, aviation wireless system, or space wireless communication system.

In this embodiment, the communication system 1 is the primary system and the communication system 2 is the secondary system. As described above, there may be multiple communication systems 1 and multiple communication systems 2, respectively. In addition, in the example of FIG. 1, the communication system 1 is composed of one communication device (the communication device 10 ₁ shown in FIG. 1), but may be composed of a plurality of communication devices 10 . The configuration of the communication device 10 may be the same as the configuration of the communication device 20 or the terminal device 30, which will be described later.

<2-1. Overall Configuration of Communication System>
FIG. 4 is a diagram showing a configuration example of the communication system 2 according to the embodiment of the present disclosure. The communication system 2 includes a communication device 20 , a terminal device 30 and a communication control device 40 . The communication system 2 provides wireless services to users or devices possessed by users through cooperative operation of wireless communication devices that configure the communication system 2 . A wireless communication device is a device having a wireless communication function, and corresponds to the communication device 20 and the terminal device 30 in the example of FIG. Note that the communication control device 40 may have a wireless communication function. In this case, the communication control device 40 can also be regarded as a wireless communication device. In the following description, the wireless communication device may be simply referred to as a communication device.

The communication system 2 may include multiple communication devices 20 , terminal devices 30 , and communication control devices 40 . In the example of FIG. 4, the communication system 1 includes communication devices 20 ₁ , 20 ₂ , 20 ₃ , 20 ₄ , 20 ₅ etc. as the communication devices 20 . The communication system 2 also includes terminal devices 30 ₁ , 30 ₂ , 30 ₃ , 30 ₄ and the like as terminal devices 30 . The communication system 1 also includes communication control devices 40 ₁ and 40 ₂ as communication control devices 40 .

In the following description, a communication device (wireless communication device) may be called a wireless system. For example, the communication device 10 and the communication devices 20 ₁ to 20 ₅ are each one wireless system. Each of the terminal devices 30 ₁ to 30 ₄ is one wireless system. Note that the wireless system may be one system composed of a plurality of wireless communication devices. For example, a system composed of one or more communication devices 20 and one or more terminal devices 30 under them may be regarded as one wireless system. It is also possible to regard the communication system 1 or the communication system 2 as one wireless system. In the following description, a communication system composed of a plurality of wireless communication devices may be called a wireless communication system or simply a communication system.

The communication device 20 (second wireless system) is a wireless communication device that wirelessly communicates with the terminal device 30 or another communication device 20 . For example, the communication device 20 is a base station (also referred to as a base station device) of a wireless communication system. The radio access technology used by the communication device 20 may be a cellular communication technology or a wireless LAN technology. Of course, the radio access technologies used by the communication device 20 are not limited to these, and other radio access technologies may be used.

The size of the coverage of the communication device 20 may also be large such as a macrocell or small such as a picocell. Of course, the size of the coverage of the communication device 20 may be extremely small like a femtocell. Also, if the communication device 20 has a beamforming capability, a cell or service area may be formed for each beam.

The communication device 20 may be installed and operated by one company, or may be installed and operated by one individual. Of course, the entity that installs and operates the communication device 20 is not limited to these. For example, the communication device 20 may be installed and operated jointly by a plurality of business operators or a plurality of individuals. Also, the communication device 20 may be a shared facility used by a plurality of businesses or a plurality of individuals. In this case, installation and operation of the equipment may be performed by a third party different from the user.

Note that the concept of a base station includes access points and wireless relay stations (also referred to as relay devices). Moreover, the concept of a base station includes not only a structure having the functions of a base station but also devices installed in the structure. The structures are, for example, buildings such as office buildings, houses, steel towers, station facilities, airport facilities, harbor facilities, and stadiums. The concept of structure includes not only buildings but also structures (non-building structures) such as tunnels, bridges, dams, fences, iron poles, and facilities such as cranes, gates, and windmills. Moreover, the concept of structures includes not only structures on the ground (land) or underground, but also structures on water such as piers and mega-floats, and structures in water such as ocean observation equipment.

Also, the base station may be a mobile base station (mobile station). At this time, the base station (mobile station) may be a wireless communication device installed in the mobile unit, or may be the mobile unit itself. In addition, the moving object may be a moving object that moves on the ground (for example, a vehicle such as a car, a bus, a truck, a train, or a linear motor car), or a moving object that moves underground (for example, in a tunnel). It may be a mobile body (for example, a subway). Of course, the mobile object may be a mobile terminal such as a smart phone. In addition, the mobile body may be a mobile body that moves on water (for example, a passenger ship, a cargo ship, a ship such as a hovercraft), or a mobile body that moves underwater (for example, a submarine, a submarine, an unmanned underwater vehicle, etc.). submersible). In addition, the mobile body may be a mobile body that moves in the atmosphere (for example, an airplane, an airship, an aircraft such as a drone), or a space mobile body that moves outside the atmosphere (for example, an artificial satellite, a spacecraft, a spacecraft, etc.). artificial celestial bodies such as stations, probes, etc.).

The terminal device 30 is a communication device having a communication function. The terminal device 30 is, for example, a mobile phone, a smart device (smartphone or tablet), a wearable terminal, a PDA (Personal Digital Assistant), a user terminal such as a personal computer. Also, the terminal device 30 may be a device other than a user terminal, such as a machine in a factory or a sensor installed in a building. For example, the terminal device 30 may be an M2M (Machine to Machine) device or an IoT (Internet of Things) device. Also, the terminal device 30 may be a device having a relay communication function, as typified by D2D (Device to Device). Also, the terminal device 30 may be a device called CPE (Client Premises Equipment) used in a wireless backhaul or the like. Also, the terminal device 30 may be a wireless communication device installed in a mobile object, or may be the mobile object itself.

The communication control device 40 is a device that controls wireless communication of the communication device 20 . For example, the communication control device 40 is a device that determines operating parameters to be used by the communication device 20 and gives instructions to the communication device 20 . At this time, the communication control device 40 may be a network manager that integrally controls the wireless devices within the network. Taking ETSI EN 303 387 and IEEE 802.19.1-2014 as an example, the communication control device 40 may be a control device such as a Spectrum Manager/Coexistence Manager that controls radio wave interference between wireless devices. In a shared frequency environment, databases (database servers, devices, systems) such as GLDB (Geolocation database) and SAS (Spectrum Access System) can also serve as the communication control device 40 .

A plurality of communication control devices 40 may exist in one communication system 2 . In this case, the communication control devices 40 exchange information on the communication devices 20 managed by each other, and perform necessary frequency allocation and interference control calculations. Basically, the control target of the communication control device 40 is the communication device 20, but the communication control device 40 may control the terminal device 30 under its control.

The configuration of each device constituting the communication system 2 will be specifically described below.

<2-2. Configuration of Communication Device>
First, the configuration of the communication device 20 will be described. FIG. 5 is a diagram showing a configuration example of the communication device 20 according to the embodiment of the present disclosure. The communication device 20 is a wireless communication device (wireless system) that wirelessly communicates with the terminal device 30 under the control of the communication control device 40 . For example, the communication device 20 is a base station device (ground station device) located on the ground. At this time, the communication device 20 may be a base station device installed in a structure on the ground, or may be a base station device installed in a mobile body moving on the ground. More specifically, the communication device 20 may be an antenna installed in a structure such as a building and a signal processing device connected to the antenna. Of course, the communication device 20 may be a structure or a mobile object itself. The term “terrestrial” is used in a broad sense to include not only terrestrial (terrestrial) but also underground, above water, and underwater.

Note that the communication device 20 is not limited to a ground station device. For example, the communication device 20 may be a base station device (non-ground station device) that moves or floats in the air or space. At this time, the communication device 20 may be an aircraft station device or a satellite station device.

The aircraft station device may be a device mounted on an aircraft or the like, or may be the aircraft itself. The concept of aircraft includes not only heavy aircraft such as airplanes and gliders, but also light aircraft such as balloons and airships. The concept of aircraft also includes rotorcraft such as helicopters and autogyros. Note that the aircraft station device (or the aircraft on which the aircraft station device is mounted) may be a manned aircraft or an unmanned aircraft such as a drone.

The satellite station device may be a device mounted on a space mobile such as an artificial satellite, or may be the space mobile itself. Satellites used as satellite station equipment include low earth orbiting (LEO) satellites, medium earth orbiting (MEO) satellites, geostationary earth orbiting (GEO) satellites, and highly elliptical orbiting (HEO) satellites. ) satellite. Of course, the satellite station equipment may be equipment mounted on a low orbit satellite, a medium orbit satellite, a geostationary satellite, or a high elliptical orbit satellite.

Also, the communication device 20 may be a relay station device. The relay station device is, for example, an aircraft station or an earth station. A relay station device can be regarded as a type of the relay device described above. An aircraft station is a radio station installed on the ground or on a mobile body moving on the ground in order to communicate with aircraft station equipment. Also, an earth station is a radio station located on the earth (including air) for communicating with satellite station equipment. The earth station may be a large earth station or a small earth station such as a VSAT (Very Small Aperture Terminal). The earth station may be a VSAT control earth station (also called parent station or HUB station) or a VSAT earth station (also called slave station). Also, the earth station may be a radio station installed in a mobile body that moves on the ground. For example, an earth station mounted on a ship is an earth station on board Vessels (ESV). The earth stations may also include aircraft earth stations located on aircraft (including helicopters) and communicating with satellite stations. The earth station may also include an aeronautical earth station located on a ground-moving mobile object and communicating with an aircraft earth station via a satellite station. Note that the relay station device may be a portable radio station that communicates with a satellite station or an aircraft station.

The communication device 20 includes a wireless communication section 21 , a storage section 22 , a network communication section 23 and a control section 24 . Note that the configuration shown in FIG. 5 is a functional configuration, and the hardware configuration may differ from this. Also, the functions of the communication device 20 may be distributed and implemented in a plurality of physically separated devices.

The wireless communication unit 21 is a wireless communication interface that wirelessly communicates with other communication devices (for example, the terminal device 30, the communication control device 40, and the other communication device 20). The radio communication section 21 operates under the control of the control section 24 . The radio communication unit 21 may correspond to a plurality of radio access schemes. For example, the wireless communication unit 21 may support both NR and LTE. The wireless communication unit 21 may be compatible with other cellular communication schemes such as W-CDMA and cdma2000. Also, the wireless communication unit 21 may support a wireless LAN communication system in addition to the cellular communication system. Of course, the wireless communication unit 21 may only support one wireless access method.

The wireless communication unit 21 includes a reception processing unit 211 , a transmission processing unit 212 and an antenna 213 . The wireless communication unit 21 may include multiple reception processing units 211 , transmission processing units 212 , and antennas 213 . Note that when the wireless communication unit 21 supports a plurality of wireless access methods, each unit of the wireless communication unit 21 can be individually configured for each wireless access method. For example, if the communication device 20 supports NR and LTE, the reception processing unit 211 and the transmission processing unit 212 may be individually configured for NR and LTE.

The reception processing unit 211 processes uplink signals received via the antenna 213 . The reception processing unit 211 includes a radio reception unit 211a, a demultiplexing unit 211b, a demodulation unit 211c, and a decoding unit 211d.

The radio receiver 211a down-converts the uplink signal, removes unnecessary frequency components, controls the amplification level, performs orthogonal demodulation, converts to a digital signal, removes the guard interval, and converts the frequency domain signal into a frequency domain signal by fast Fourier transform. Perform extraction, etc. For example, assume that the radio access method of the communication device 20 is a cellular communication method such as LTE. At this time, the demultiplexing unit 211b separates uplink channels such as PUSCH (Physical Uplink Shared Channel) and PUCCH (Physical Uplink Control Channel) and uplink reference signals from the signal output from the radio receiving unit 211a. The demodulator 211c demodulates the received signal using a modulation scheme such as BPSK (Binary Phase Shift Keying) or QPSK (Quadrature Phase Shift Keying) for the modulation symbols of the uplink channel. The modulation scheme used by the demodulator 211c may be 16QAM (Quadrature Amplitude Modulation), 64QAM, or 256QAM. The decoding unit 211d performs decoding processing on the demodulated coded bits of the uplink channel. The decoded uplink data and uplink control information are output to the control section 24 .

The transmission processing unit 212 performs transmission processing of downlink control information and downlink data. The transmission processing unit 212 includes an encoding unit 212a, a modulation unit 212b, a multiplexing unit 212c, and a radio transmission unit 212d.

The encoding unit 212a encodes downlink control information and downlink data input from the control unit 24 using an encoding method such as block encoding, convolutional encoding, and turbo encoding. The modulator 212b modulates the coded bits output from the encoder 212a using a predetermined modulation scheme such as BPSK, QPSK, 16QAM, 64QAM, 256QAM. The multiplexer 212c multiplexes the modulation symbols of each channel and downlink reference signals, and arranges them in predetermined resource elements. The radio transmission unit 212d performs various signal processing on the signal from the multiplexing unit 212c. For example, the radio transmission unit 212d performs conversion to the time domain by fast Fourier transform, addition of guard intervals, generation of baseband digital signals, conversion to analog signals, quadrature modulation, up-conversion, removal of extra frequency components, Perform processing such as power amplification. A signal generated by the transmission processing unit 212 is transmitted from the antenna 213 .

The storage unit 22 is a data readable/writable storage device such as a DRAM, an SRAM, a flash memory, or a hard disk. The storage unit 22 functions as storage means of the communication device 20 . The storage unit 22 stores desired transmission power information, operation parameters, and the like. The desired transmission power information is information on transmission power that the communication device 20 requests of the communication control device 40 as information on transmission power required for transmission of radio waves. The operation parameter is information (for example, setting information) regarding the radio wave transmission operation of the communication device 20 . For example, the operational parameter is information on the maximum value of transmission power allowed for the communication device 20 (maximum allowable transmission power). Of course, the operating parameters are not limited to information on the maximum allowable transmission power.

The network communication unit 23 is a communication interface for communicating with other devices. For example, the network communication unit 23 is a LAN (Local Area Network) interface such as (Network Interface Card). The network communication unit 23 may be a USB interface configured by a USB (Universal Serial Bus) host controller, a USB port, and the like. Also, the network communication unit 23 may be a wired interface or a wireless interface. The network communication unit 23 functions as network communication means of the communication device 20 . The network communication unit 23 communicates with other devices under the control of the control unit 24 .

The control unit 24 is a controller that controls each unit of the communication device 20 . The control unit 24 is implemented by a processor such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). For example, the control unit 24 is implemented by the processor executing various programs stored in the storage device inside the communication device 20 using a RAM (Random Access Memory) or the like as a work area. Note that the control unit 24 may be implemented by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). CPUs, MPUs, ASICs, and FPGAs can all be considered controllers.

The control unit 24 includes an acquisition unit 241, a determination unit 242, a setting unit 243, and a transmission unit 244, as shown in FIG. Each block (acquisition unit 241 to transmission unit 244) constituting the control unit 24 is a functional block indicating the function of the control unit 24. FIG. These functional blocks may be software blocks or hardware blocks. For example, each of the functional blocks described above may be one software module realized by software (including microprograms), or may be one circuit block on a semiconductor chip (die). Of course, each functional block may be one processor or one integrated circuit. The configuration method of the functional blocks is arbitrary. Note that the control unit 24 may be configured by functional units different from the functional blocks described above. The operation of each block (acquisition unit 241 to transmission unit 244) constituting the control unit 24 will be described in detail in the explanation of the communication control processing and the like described later.

<2-3. Configuration of terminal device>
Next, the configuration of the terminal device 30 will be described. FIG. 6 is a diagram showing a configuration example of the terminal device 30 according to the embodiment of the present disclosure. The terminal device 30 is a communication device that wirelessly communicates with the communication device 20 and the communication control device 40 . In addition, in the present embodiment, the concept of a communication device (wireless communication device) includes not only a base station device but also a terminal device. A communication device can be rephrased as a wireless system.

The terminal device 30 includes a wireless communication section 31 , a storage section 32 , an input/output section 33 and a control section 34 . Note that the configuration shown in FIG. 6 is a functional configuration, and the hardware configuration may differ from this. Also, the functions of the terminal device 30 may be distributed and implemented in a plurality of physically separated configurations.

The wireless communication unit 31 is a wireless communication interface that wirelessly communicates with other communication devices (for example, the communication device 20 and other terminal devices 30). The wireless communication section 31 operates under the control of the control section 34 . The radio communication unit 31 supports one or more radio access schemes. For example, the wireless communication unit 31 supports both NR and LTE. The wireless communication unit 31 may support other wireless access schemes such as W-CDMA and cdma2000.

The wireless communication unit 31 includes a reception processing unit 311 , a transmission processing unit 312 and an antenna 313 . The wireless communication unit 31 may include multiple reception processing units 311 , transmission processing units 312 , and antennas 313 . Note that when the wireless communication unit 31 supports a plurality of wireless access methods, each unit of the wireless communication unit 31 can be individually configured for each wireless access method. For example, the reception processing unit 311 and the transmission processing unit 312 may be individually configured for LTE and NR. The configurations of the reception processing unit 311 and the transmission processing unit 312 are the same as those of the reception processing unit 211 and the transmission processing unit 212 of the communication device 20 .

The storage unit 32 is a data readable/writable storage device such as a DRAM, an SRAM, a flash memory, or a hard disk. The storage unit 32 functions as storage means of the terminal device 30 .

The input/output unit 33 is a user interface for exchanging information with the user. For example, the input/output unit 33 is an operation device such as a keyboard, a mouse, operation keys, a touch panel, etc. for the user to perform various operations. Alternatively, the input/output unit 33 is a display device such as a liquid crystal display (Liquid Crystal Display) or an organic EL display (Organic Electroluminescence Display). The input/output unit 33 may be an acoustic device such as a speaker or buzzer. Also, the input/output unit 33 may be a lighting device such as an LED (Light Emitting Diode) lamp. The input/output unit 33 functions as input/output means (input means, output means, operation means, or notification means) of the terminal device 30 .

The control unit 34 is a controller that controls each unit of the terminal device 30 . The control unit 34 is implemented by a processor such as a CPU or MPU, for example. For example, the control unit 34 is implemented by the processor executing various programs stored in the storage device inside the terminal device 30 using the RAM or the like as a work area. Note that the control unit 34 may be implemented by an integrated circuit such as an ASIC or FPGA. CPUs, MPUs, ASICs, and FPGAs can all be considered controllers.

<2-4. Configuration of Communication Control Device>
The communication control device 40 is a device that controls wireless communication of the communication device 20 . The communication control device 40 may control wireless communication of the terminal device 30 via the communication device 20 or directly. The communication control device 40 is, for example, a network manager that integrally controls wireless devices within the network. For example, the communication control device 40 is a Spectrum Manager/Coexistence Manager. Further, the communication control device 40 may be a database server such as GLDB (Geolocation database) or SAS (Spectrum Access System).

Note that if the communication system 2 is a cellular communication system, the communication control device 40 may be a device that constitutes a core network. The core network CN is, for example, EPC (Evolved Packet Core) or 5GC (5G Core network). If the core network is an EPC, the communication control device 40 may be, for example, a device that functions as an MME (Mobility Management Entity). Also, if the core network is 5GC, the communication control device 40 may be, for example, a device having a function as an AMF (Access and Mobility Management Function). Note that even if the communication system 2 is a cellular communication system, the communication control device 40 does not necessarily have to constitute a core network. For example, the communication control device 40 may be a device that functions as an RNC (Radio Network Controller).

Note that the communication control device 40 may have a gateway function. For example, if the core network is EPC, the communication control device 40 may be a device having functions as S-GW (Serving Gateway) or P-GW (Packet Data Network Gateway). Also, if the core network is 5GC, the communication control device 40 may be a device having a function as a UPF (User Plane Function). Note that the communication control device 40 does not necessarily have to constitute a core network. For example, assume that the core network is a W-CDMA or cdma2000 core network. At this time, the communication control device 40 may be a device that functions as an RNC (Radio Network Controller).

Also, the communication control device 40 may be a system that controls a plurality of secondary systems. In this case, the communication system 2 can be regarded as a system with multiple secondary systems.

FIG. 7 is a diagram showing a configuration example of the communication control device 40 according to the embodiment of the present disclosure. The communication control device 40 includes a wireless communication section 41 , a storage section 42 , a network communication section 43 and a control section 44 . Note that the configuration shown in FIG. 7 is a functional configuration, and the hardware configuration may differ from this. Also, the functions of the communication control device 40 may be distributed and implemented in a plurality of physically separated configurations. For example, the communication control device 40 may be composed of a plurality of server devices.

The wireless communication unit 41 is a wireless communication interface that wirelessly communicates with other communication devices (for example, the communication device 20, the terminal device 30, and another communication control device 40). The wireless communication section 41 operates under the control of the control section 44 . The radio communication unit 31 supports one or more radio access schemes. For example, the wireless communication unit 31 supports both NR and LTE. The wireless communication unit 31 may support other wireless access schemes such as W-CDMA and cdma2000. The configuration of the wireless communication unit 41 is the same as that of the wireless communication unit 21 of the communication device 20 .

The storage unit 42 is a data readable/writable storage device such as a DRAM, an SRAM, a flash memory, or a hard disk. The storage unit 22 functions as storage means of the communication device 20 . The storage unit 22 stores operation parameters of each of the plurality of communication devices 20 forming the communication system 2 .

The network communication unit 43 is a communication interface for communicating with other devices. The network communication unit 43 may be a network interface or a device connection interface. For example, the network communication unit 43 may be a LAN (Local Area Network) interface such as a NIC (Network Interface Card). The network communication unit 43 may be a USB interface configured by a USB (Universal Serial Bus) host controller, a USB port, and the like. Also, the network communication unit 43 may be a wired interface or a wireless interface. The network communication unit 43 functions as communication means of the communication control device 40 . The network communication unit 43 communicates with the communication device 20 and the terminal device 30 under the control of the control unit 44 .

The control unit 44 is a controller that controls each unit of the communication control device 40 . The control unit 44 is implemented by a processor such as a CPU or MPU, for example. For example, the control unit 44 is implemented by the processor executing various programs stored in the storage device inside the communication control device 40 using the RAM or the like as a work area. Note that the control unit 44 may be realized by an integrated circuit such as ASIC or FPGA. CPUs, MPUs, ASICs, and FPGAs can all be considered controllers.

The control unit 44 includes an acquisition unit 441, a first determination unit 442, a calculation unit 443, a classification unit 444, a second determination unit 445, and a transmission unit 446, as shown in FIG. . Each block (acquisition unit 441 to transmission unit 446) constituting the control unit 44 is a functional block indicating the function of the control unit 44. FIG. These functional blocks may be software blocks or hardware blocks. For example, each of the functional blocks described above may be one software module realized by software (including microprograms), or may be one circuit block on a semiconductor chip (die). Of course, each functional block may be one processor or one integrated circuit. The configuration method of the functional blocks is arbitrary. Note that the control unit 44 may be configured by functional units different from the functional blocks described above. The operation of each block (acquisition unit 441 to transmission unit 446) constituting the control unit 44 will be described in detail in the explanation of the communication control processing and the like described later.

<<3. Residual Interference Margin>>
As described using FIG. 1, the communication system 2 (secondary system) has a residual interference margin (residual interference amount) for various reasons (for example, the reasons (R1) to (R4) described above). can occur. The communication control device 40 distributes this residual interference margin to each communication device 20 and adjusts the maximum allowable transmission power of the communication device 20 based on the distributed residual interference margin. As a result, radio wave resources can be used more effectively. The residual interference margin will be explained before explaining the processing related to the allocation of the residual interference margin according to the present embodiment. First, an interference model assumed in this embodiment will be described.

<3-1. Interference model>
FIG. 8 is an explanatory diagram showing an example of an interference model assumed in this embodiment. The interference model shown in FIG. 8 is applied, for example, when the primary system has coverage. In the example of FIG. 8, the communication system 1 (primary system) is a wireless communication system having a service area. This service area is, for example, the protected area of the communication system 1 . A plurality of interference calculation reference points (hereinafter referred to as protection points) are set in the protection area. A protection point is set by, for example, an operator of the communication system 1 or a public institution that manages radio waves (hereinafter referred to as an administrator). For example, the administrator may partition the protected area into grids and set the center of a predetermined grid as the protected point. The method of determining protection points is arbitrary. An interference margin for each protection point is set by an administrator or the like. FIG. 8 shows interference given to a protection point by a plurality of communication devices 20 forming a communication system 2 (secondary system). The communication control device 40 of the communication system 2 controls the transmission power of the multiple communication devices 20 so that the cumulative interference at each protection point does not exceed the set interference margin.

FIG. 9 is an explanatory diagram showing another example of the interference model assumed in this embodiment. The interference model shown in FIG. 9 is applied, for example, when the primary system only receives. In the example of FIG. 9, communication system 1 (primary system) has a receiving antenna as communication device ₁₀₂ . Communication device ₁₀₂ is, for example, a receiving antenna of a satellite ground station. The communication control device 40 of the communication system 2 controls the transmission power of the plurality of communication devices 20 so that the position of the receiving antenna is set as a protection point and the cumulative interference at that point does not exceed the interference margin.

<3-2. Calculation example of residual interference margin>
Next, an example of distribution of residual interference margins will be described. As explained using FIG. 1, a residual interference margin (residual interference amount) can occur in the secondary system. FIG. 10 is an explanatory diagram for explaining the residual interference margin generated in the communication system 2. As shown in FIG. FIG. 10 shows the total amount of interference set in each of the two communication control devices 40 (communication control devices 40 ₁ and 40 ₂ ). Further, FIG. 10 shows the amount of interference (interference amount) given to a predetermined protection point of the communication system 1 by a plurality of communication devices 20 (communication devices 20 ₁ to 20 ₅ ) under the control of two communication control devices 40. It is shown. The amount of interference obtained by subtracting the amount of interference by the communication device 20 from the total amount of interference by each of the two communication control devices 40 is the residual interference margin.

It should be noted that this amount of interference is set for each protection point and each frequency channel of the wireless communication system (primary system) to be protected. When there are a plurality of wireless communication systems having protection targets, the communication control device 40 considers the amount of interference for the number of wireless communication systems having protection targets.

It should be noted that there may be a case where information on the interference margin is not directly given to the communication control device 40 . In this case, the communication control device 40, the signal-to-interference-plus-noise-ratio (SINR: Signal-to-Interference-plus-Noise-Ratio) desired by the protection target (for example, the communication system 1) information based on the interference margin can be calculated. Alternatively, the communication control device 40 may calculate the interference margin based on information on the carrier-to-interference-plus-noise-ratio (CINR). Of course, the communication control device 40 may calculate the interference margin based on information on the signal-to-interference ratio (SIR).

For example, consider the case where SINR is used to calculate the interference margin. Assuming that the SINR desired by the target of protection is SINR _{Required (dB)} , SINR _{Required (dB)} is expressed as in Equation (1) below. where S is the signal power desired by the protected object and N is the noise power received by the protected object. I _accept is the allowable interference power. SINR _{Required (dB)} is SINR _Required expressed in decibels. That is, a relationship of SINR _Required(dB) =10log(SINR _Required ) holds. Here, the interference margin (also called allowable interference power) is assumed to be I _{accept (dBm)} . At this time, I _{accept (dBm)} is derived by the following equation (2). Note that I _{accept (dBm)} is I _accept expressed in decibel milliwatts. That is, the relationship of I _{accept (dBm)} = 10log (I _accept ) holds.

The communication control device 40 can calculate the interference margin I _{accept (dBm)} by obtaining the signal to interference noise power ratio SINR, the desired signal power S, and the noise power N from the communication system 1 or the like. Note that the method of calculating the interference margin is not limited to the above example. Communication control apparatus 40 may calculate the interference margin using information other than SINR, CINR, and SIR.

In the following description, for ease of understanding, it is assumed that the communication system 1 (primary system) has only one frequency channel and one protection point. Also, it is assumed that the interference margin I _accept at the protection point is given to the communication control device 40 in advance by the administrator or the like. Of course, the communication control device 40 may acquire the interference margin I _accept from another device (for example, a device that configures the communication system 1 or a device of a public institution that manages radio waves). Also, the interference margin I _accept may be calculated by the communication control device 40 based on information provided from the communication system 1 or the like.

The communication system 1 may have multiple protection points and frequency channels. In this case, the communication control device 40 controls the transmission power of the communication device 20 so as not to exceed the interference margin for all protection points and frequency channels. In addition, when considering cumulative interference to the primary system, communication control apparatus 40 may have to consider interference to adjacent channels in addition to interference to the same channel. In this case, focusing on one communication control device 40, one interference calculation reference point (protection point), a predetermined frequency channel of the primary system, and an adjacent frequency channel of the predetermined frequency channel, the following communication control processing may be applied. good.

<<4. Operation of communication system >>
Next, the operation of the communication system 2 (secondary system) will be described. As described above, in the secondary system, a residual interference margin (residual interference amount) can occur for various reasons (for example, reasons (R1) to (R4) described above). If this residual interference margin can be used for radio wave transmission, radio wave resources can be used more effectively. In the present embodiment, the communication control device 40 adjusts the once-determined maximum allowable transmission power of the communication device 20 within the range of the residual interference margin, thereby achieving further effective use of radio wave resources.

<4-1. Communication control processing>
FIG. 11 is a sequence diagram showing an example of communication control processing according to the embodiment of the present disclosure. Although only two communication control devices 40 are shown in FIG. 11, more than two communication control devices 40 may be provided. Of course, only one communication control device 40 may be provided. A plurality of communication control devices 40 may perform the same processing. For example, each of the multiple communication control devices 40 may determine the operating parameters of all of the multiple communication devices 20 included in the communication system 2 . In this case, a plurality of communication control devices 40 will each determine the same operating parameter for a given communication device 20 .

In the following description, for ease of understanding, it is assumed that the communication control device ₄₀₁ is the subject of processing when it is necessary to specify and explain each communication control device 40 . Of course, another communication control device 40 (for example, communication control device 40 ₂ ) may be the subject of processing. Also, a plurality of communication control devices 40 may perform the same processing (for example, the processing described below) at the same time. Note that the communication control device 40 may control wireless communication of the terminal device 30 via the communication device 20 or directly. In this case, the description of the communication device 20 shown below can be replaced with the terminal device 30 . As described above, the terminal device 30 is also a type of communication device.

Communication control processing according to an embodiment of the present disclosure will be described below. The communication control process described below is executed for each predetermined event (for example, each time a certain period of time or each time a control signal is received from a host device).

First, the acquisition unit ₄₄₁ of the communication control device 401 exchanges information on the communication device 20 under its control with another communication control device 40 (step S1). Here, the exchanged information may include (A) information about the active communication device 20 and (B) information about the inactive communication device 20, as described below. At this time, (A) the information of the active communication device 20 may include the following information A1 to A6. In addition, (B) the information of the inactive communication device 20 may include the information of B1 to A4 below.

(A) Information of active communication device 20 A1. Various ID information assigned to the communication device 20 A2. Information indicating the position of the communication device 20 A3. Information on frequency used by communication device 20 A4. Information on transmission power in use at the frequency indicated by A3 A5. Maximum transmission power applicable to communication device 20 (hardware dependent)
A6. Transmit power class, device category

(B) Information of inactive communication device 20 B1. Various ID information assigned to the communication device 20 B2. Information indicating the position of the communication device 20 B3. Maximum transmission power applicable to communication device 20 (hardware dependent)
B4. Transmit power class, device category

Here, the active communication device 20 means the communication device 20 for which the communication control device 40 has finished calculating the maximum allowable transmission power, or the communication device 20 for which radio wave transmission permission has already been received from the communication control device 40. indicates Other communication devices 20 that are only registered with the communication control device 40 are inactive communication devices 20 .

The information acquired by the acquisition unit 441 may be information regarding the hardware configuration of the communication device 20 . In the following description, information regarding the hardware configuration of the communication device 20 is referred to as hardware configuration information. The hardware configuration information may be information of "maximum transmission power applicable to communication device 20" in A5 or B4. The information acquired by the acquisition unit 441 may be information on the transmission power desired by the communication device 20 (for example, the transmission power requested by the communication device 20 from the communication control device 40). The transmission power desired by the communication device 20 is called desired transmission power. The acquisition unit 441 saves the acquired information in the storage unit 42 .

After that, the first determination unit 442 of the communication control device 40 ₁ performs calculations related to primary system protection in consideration of communication devices 20 under control of other communication control devices 40 (for example, the communication control device 40 ₂ ). implement. Specifically, the first determination unit 442 determines the _operating parameters ( A first operating parameter) is determined (step S2). The operating parameter is a setting used by the communication device 20 for radio wave transmission, and is, for example, information regarding the power of radio wave transmission. For example, the operating parameter is information on the maximum transmission power allowed for the communication device 20 (maximum allowable transmission power).

Next, the transmission unit 446 of the communication control device ₄₀₁ notifies each of the plurality of communication devices 20 of the operation parameter (first operation parameter) (step S3). The acquisition unit 241 of the communication device 20 acquires the operating parameters from the communication control device ₄₀₁ . Then, the determination unit 242 of the communication device 20 determines whether or not the operating parameters are applicable to itself. For example, the determination unit 242 determines whether the maximum allowable transmission power included in the operating parameters is equal to or greater than the minimum required power for transmitting radio waves. Note that, if the notified maximum allowable transmission power is greater than the required power, the determination unit 242 determines the surplus power (the difference between the maximum allowable transmission power and the required power). good.

Then, the transmission unit 244 of the communication device 20 notifies the communication control device ₄₀₁ of the determination result (step S4). The acquisition unit 441 of the communication control device ₄₀₁ acquires the determination result from each of the plurality of communication devices 20 . The acquisition unit 441 may acquire hardware configuration information and desired transmission power information from each of the plurality of communication devices 20 . The acquisition unit 441 saves the acquired information in the storage unit 42 .

After obtaining the determination result, the calculation unit 443 of the communication control device ₄₀₁ calculates a residual interference margin (residual interference amount) based on the operation parameter determined in step S2 and the determination result obtained in step S4 (step S5). This residual interference margin is the amount of interference that can be additionally allocated to the communication device 20 (second radio system) under the control of the communication control device _40-1 .

Then, the second determining unit 445 of the communication control device ₄₀₁ executes adjustment processing for adjusting the operating parameters of the communication device 20 (step S6). Specifically, the second determining unit 445 adjusts the maximum allowable transmission power determined in step S2 based on the residual interference margin calculated in step S5. The second determining unit 445 uses the maximum allowable transmission power determined in step S2 and adjusts the maximum allowable transmission power of each communication device 20 within the range of the residual interference margin calculated in step S5.

The adjusted maximum allowable transmission power is given by the following equation (3). Equation (3) indicates the adjusted maximum allowable transmission power for the i-th communication device 20 . i is the index of the communication device 20; For the i-th communication device 20, if i is 1, it indicates the communication device _20-1 , and if i is 2, it indicates the communication device _20-2 . Equation (4) indicates that the cumulative interference of multiple communication devices 20 does not exceed the interference margin of the primary system p (eg, communication system 1). Primary system p refers to the pth primary system. The second determining unit 445 adjusts the maximum allowable transmission power of each communication device 20 so as to satisfy the condition shown in Equation (4) below.

Note that the meanings of the parameters in equations (3) and (4) are as follows.

f: frequency.
i: index of the communication device 20;
P _MaxTx,i (f) _(dBm) : the maximum allowed transmit power before adjustment at frequency f for the i-th communication device 20 .
α _i (f) _(dB) : Adjustment amount (adjustment value) of the maximum allowable transmission power at frequency f for the i-th communication device 20 .
P _Tx,i ^Cx (f) _(dBm) : Adjusted maximum allowable transmit power at frequency f for the i-th communication device 20 .
I _accept,p (f) _(dBm) : Interference margin of primary system p at frequency f.
N _Tx (f): the number of communication devices 20 on frequency f.
L _{pi (dB)} : Path loss between primary system p and i-th communication device 20 .
G _{Ant (dB)} : Antenna gain of primary system p.

Note that parameters marked with (dB) or (dBm) are in logarithmic notation. Specifically, when (dB) is attached to a parameter, it indicates that the parameter is in decibel notation. Also, when (dBm) is attached to a parameter, it indicates that the parameter is in decibel milliwatt notation. Note that parameters with neither (dB) nor (dBm) attached indicate antilogarithmic (linear) notation. For example, if the antilogarithmic value of transmission power is "x" (mW), its logarithmic notation (in decibel milliwatts) is "x _(dBm) ". That is, x _(dBm) = 10log(x). Calculations appearing in this embodiment can be replaced with calculations having the same significance. Logarithmic notation (decibel notation, decibel milliwatt notation) and antilogarithmic notation can be appropriately replaced.

The second determining unit 445 calculates the adjusted maximum allowable transmission power P _Tx,i ^Cx (f) _(dBm) based on the residual interference margin calculated in step S5. Here, assuming that the residual interference margin is I _Remained (f) _(dBm) , the residual interference margin I _Remained (f) _(dBm) is expressed by the following equation (5).

Here, on the right side of equation (5), the difference between the allowable amount of interference of the primary system p and the cumulative interference power that can be given to the primary system from the plurality of communication devices 20 is calculated. This difference is the residual interference margin. In calculating the adjusted maximum allowable transmission power, second determining section 445 determines that the amount of change in accumulated interference power caused by the adjustment amount α _i (f) _(dB) shown in Equation (3) is residual interference. Take care not to exceed the margin I _Remained (f) _(dB) . Therefore, the second determination unit 445 needs to consider the following formula (6) as a constraint.

In the right-hand side of Equation (6), the summation (Σ) indicates the difference between the interference amount after transmission power adjustment and the interference amount before transmission power adjustment in each communication device 20 . The second determining unit 445 determines the adjusted maximum allowable transmission power P _Tx,i ^Cx (f) _(dBm) or the adjustment amount α Determine _i (f) _(dB) . The adjustment amount can be rephrased as an adjustment value.

Then, the transmitter 446 notifies the communication device 20 of the adjusted maximum allowable transmission power as an operating parameter (second operating parameter) (step S7). At this time, the transmission unit 446 uses a combination of the adjusted maximum allowable transmission power P _Tx,i ^Cx (f) _(dBm) and the adjustment amount α _i (f) _(dB) as an operation parameter (second operation parameter) for i th communication device 20 may be notified. Alternatively, the transmitter 446 operates both the adjusted maximum allowable transmission power P _Tx,i ^Cx (f) _(dBm) and the pre-adjustment maximum allowable transmission power P _Tx,i (f) _(dBm). You may notify as a parameter (2nd operation parameter). These parameters notified by the transmitting unit 446 may be expressed in true value or in logarithmic notation. Of course, the parameter notation format may be another notation format. The notation format of the parameter can be arbitrarily changed as long as it is finally transmitted to the communication device 20 .

The acquisition unit 441 of the communication device 20 acquires the operating parameters (second operating parameters) from the communication control device ₄₀₁ . Then, the setting unit 243 of the communication device 20 sets the operation parameters acquired by the acquisition unit 441 . Then, the transmission unit 244 of the communication device 20 transmits radio waves based on the set operating parameters. For example, the i-th communication device 20 outputs radio waves so as not to exceed the adjusted maximum allowable transmission power P _Tx,i ^Cx (f) _(dBm) .

After completing the notification of the operation parameters, the control unit 44 of the communication control device ₄₀₁ terminates the communication control process.

<4-2. Example of adjustment processing>
Determining the optimum α _i (f) _(dB) based on an arbitrary metric based on the above-described constraints requires a very large amount of calculation depending on the number of communication devices 20 . Therefore, in the present embodiment, the above-described adjustment processing in step S6 is performed in consideration of the mutual interference group. Here, a mutual interference group is a group of communication devices 20 that interfere with each other.

FIG. 12 is an explanatory diagram for explaining mutual interference groups. In the example of FIG. 12, communication devices 20 ₁ to 20 ₃ form mutual interference group #1, communication devices 20 ₄ to 20 ₅ form mutual interference group #2, and communication device 20 ₆ forms mutual interference group #2. They form interference group #3. Note that, like mutual interference group #3, one communication device 20 may belong to one mutual interference group.

In the example of FIG. 12 , the communication devices 20 within the mutual interference group have a positional relationship in which the communication ranges (coverages) overlap. Therefore, when a predetermined communication device 20 in the mutual interference group outputs radio waves, it interferes with the communication of other communication devices 20 in the mutual interference group. For example, assume that the terminal device 30 is located at a position where the cell formed by the communication device _20-1 and the cell formed by the communication device _20-2 overlap, and the communication device _20-1 and the terminal device 30 are communicating. . At this time, if the communication device _20-2 outputs radio waves, the output may interfere with the communication between the communication device _20-1 and the terminal device 30. FIG.

In this embodiment, interference between communication devices is calculated for each mutual interference group to obtain α _i (f) _(dB) , thereby preventing an increase in the amount of calculation. FIG. 13 is a flowchart illustrating an example of adjustment processing according to an embodiment of the present disclosure.

The grouping shown in step S61 may be performed by any of the communication device 20, the network manager that manages the communication devices 20, or the communication control device 40. FIG. When an entity other than the communication control device 40 performs grouping, it is desirable that the entity notifies the communication control device 40 of the grouping information. In the following explanation, it is assumed that the communication control device ₄₀₁ performs grouping.

An example of the adjustment process will be described below with reference to the flowchart of FIG. The adjustment process described below is executed, for example, in step S6 of the communication control process shown in FIG.

First, the classification unit 444 of the communication control device ₄₀₁ groups the communication devices 20 (step S61). Here, it is assumed that the communication devices 20 to be grouped are communication device groups that can give accumulated interference power to one primary system. The classification unit 444 calculates, estimates, or derives the mutual interference relationship between target communication devices 20, and treats the communication devices in the mutual interference relationship as one "mutual interference group." Here, the classification unit 444 may determine whether or not there is a mutual interference relationship (whether or not there is mutual interference) based on the overlapping relationship using the coverage of the communication device, for example. Further, the classification unit 444 determines whether there is mutual interference based on the class information "Network Geometry Class" adopted in IEEE Std 802.19.1-2014 and IEEE Std 802.19.1a-2017. can be determined.

In the example of FIG. 12, the classification unit 444 determines the overlapping relationship based on the coverage of the communication device 20, and performs grouping based on the determination result. Coverage itself can be determined by various metrics. For example, the classification unit 444 may determine, as the coverage of the communication device 20, the largest area in which the received power level of radio waves transmitted by the communication device 20 satisfies an arbitrary value. Alternatively, the classification unit 444 may determine a circular area centered at the position of the communication device 20 and having an arbitrary radius as the coverage of the communication device 20 . Of course, the classification unit 444 may determine the service area of the communication device 20 as the coverage of the communication device 20 . Classifier 444 can determine coverage of communication device 20 in a variety of ways.

The coverage of the communication device 20 may be calculated and determined by the communication control device 40 itself, or information notified from another device may be used as the coverage of the communication device 20 as it is. For example, the communication control device 40 may obtain coverage information calculated by the communication device 20 itself from the communication device 20 (or the network manager). Alternatively, the communication control device 40 may acquire coverage information written in advance in the software of the communication device 20 from the communication device 20 (or the network manager). The information on the coverage of the communication device 20 is notified to the communication control device 40 by the user of the communication device 20 (for example, a mobile communication carrier) using an API or a dedicated web form provided by the communication control device 40. may

Also, the classifying unit 444 may perform grouping based on the class information of the communication device 20 . The class information (transmission power class information) is information about the transmission power class defined for the communication device 20 . Transmission power classes of various standards can be adopted. For example, FCC regulations, C.I. F. R Part 96 Citizens Broadband Radio Service (CBRS) defines two types of classes, category A and category B, as transmission power classes for communication devices corresponding to base stations/access points. Category A is a category with a maximum EIRP of 30 dBm/10 MHz, and category B is a category with a maximum EIRP of 47 dBm/10 MHz. For example, if the class information of the communication device 20 is information based on this criterion, the classification unit 444 may classify the communication devices 20 of category B into one mutual interference group.

In addition, the classification unit 444 may combine the above-described coverage information and classify the communication devices 20 of category B whose coverage partially or entirely overlaps into one mutual interference group. Of course, the transmission power class can adopt various standards regardless of the example of CBRS.

In addition, when a plurality of communication devices 20 form one cell, as typified by a DAS (Distributed Antenna System), the classification unit 444 classifies the plurality of communication devices 20 that form one cell. It is also possible to discriminate as one "mutual interference group".

Note that the classification unit 444 does not necessarily have to classify the communication device 20 into the mutual interference group. The classification unit 444 may classify the multiple communication devices 20 into multiple groups based on other criteria. A "group" that appears in the following description does not necessarily have to be a mutual interference group. "Group" appearing in the following description can be replaced with "set". For example, 'unadjustable group' can be replaced with 'unadjustable set', and 'unadjustable group' can be replaced with 'unadjustable set'.

Note that the classification unit 444 does not necessarily have to classify the plurality of communication devices 20 included in the communication system 2 into a plurality of groups. The classification unit 444 may classify a plurality of communication devices 20 into one group.

Subsequently, the second determination unit 445 of the communication control device 40 ₁ determines the allocation amount I _Remained,m (f) _(dBm) of the surplus interference margin allocated to each group determined in step S61 (step S62). . where m is the group index. That is, the allocation amount I _Remained,m (f) _(dBm) indicates the allocation amount I _Remained,m (f) _(dBm) to group m (predetermined set).

Here, the second determination unit 445 determines the allocation amount I _Remained,m (f) _(dB) so as to satisfy the constraints shown in the following equations (7) and (8). Equation (7) indicates that the allocation quantity I _Remained,m (f) should not exceed the residual interference margin I _Remained (f). Equation (7) also indicates that the amount of interference allocated to one group (predetermined set) may be all or part of the residual interference margin. Equation (8) also indicates that the total amount of allocation allocated to each group must not exceed the residual interference margin I _Remained (f) _(dBm) . Note that N _Group shown in Equation (8) indicates the number of groups.

The criteria shown in (D1) to (D3) below can be applied to determine the allocation amount of the residual interference margin.

(D1) If all the communication devices 20 belonging to a group are unable to adjust their operating parameters, the second determining unit 445 does not allocate a residual interference margin to that group (hereinafter referred to as an unadjustable group). For example, if all communication devices 20 belonging to a group cannot apply the residual interference margin to their transmission power due to device hardware limitations, the second decision unit 445 does not allocate the residual interference margin to that group.

Specifically, the second determining unit 445 determines an unadjustable group to which all the communication devices 20 belonging to it cannot adjust the operation parameters from one or more groups classified in step S61. Then, the second determining unit 445 assigns a residual interference margin to another group (adjustable group) including at least one communication device 20 whose operating parameters are adjustable without allocating a residual interference margin to the non-adjustable group. Allocate part or all. At this time, the acquisition unit 441 may acquire the hardware configuration information of each communication device 20 from the storage unit 42 . Then, the second determining unit 445 may determine, as an unadjustable group, a group in which all the communication devices 20 to which it belongs cannot adjust the operation parameters due to the hardware configuration.

(D2) If all the communication devices 20 belonging to the group do not require adjustment of their operating parameters, the second determining unit 445 does not distribute the residual interference margin to that group (hereinafter referred to as an adjustment-unnecessary group). For example, if all communication devices 20 belonging to a group can apply the desired transmission power regardless of restrictions imposed by primary system protection, the second decision unit 445 does not allocate the residual interference margin to that group.

Specifically, the second determining unit 445 determines an adjustment-unnecessary group, to which all the communication devices 20 belonging to which do not require adjustment of operation parameters, from one or more groups classified in step S61. Then, the second determining unit 445 assigns a residual interference margin to another group (adjustable group) including at least one communication device 20 whose operation parameter can be adjusted without allocating a residual interference margin to the adjustment-unnecessary group. Allocate part or all. At this time, the acquisition unit 441 may acquire information on the desired transmission power of each communication device 20 from the storage unit 42 . Then, the second determining unit 445 may determine a group in which all the communication devices 20 belonging to it satisfy the desired transmission power as an adjustment-unnecessary group.

(D3) The second determining unit 445 distributes the residual interference margin based on the number of communication devices 20 included in each group. For example, the allocation amount I _Remained,m (f) _(dBm) to group m can be calculated as shown in Equation (9) below. where N _m,CommDevice is the number of communication devices 20 in group m. Also, N _{Total, CommDevice} is the total number of communication devices 20 .

Note that the number Nm _,CommDevice of the communication devices 20 in the group m is a number excluding “communication devices 20 whose operating parameters cannot be adjusted” and/or “communication devices 20 whose operating parameters do not need to be adjusted”. may Further, the total number of communication devices 20 N _{Total, CommDevice} may be a number excluding "communication devices 20 whose operating parameters cannot be adjusted" and/or "communication devices 20 whose operating parameters do not need to be adjusted". At this time, the “communication device 20 whose operating parameters cannot be adjusted” is, for example, the communication device 20 that cannot apply the residual interference margin to the transmission power due to hardware restrictions. Also, the “communication device 20 that does not require adjustment of operating parameters” is, for example, the communication device 20 that already satisfies the desired transmission power.

Subsequently, the second determination unit 445 selects a group that has not yet been subjected to allocation processing from among the plurality of groups (step S63). Note that the second determining unit 445 may remove the unadjustable group and/or the adjustment-unnecessary group from the plurality of groups to be selected before executing step S63. Then, the second determining unit 445 executes distribution processing for the selected group (predetermined set) (step S64). In the allocation process, based on the residual interference margin allocation amount I _Remained,m (f) _(dBm) determined in step S62, the residual interference margin is allocated to each communication device 20 within the group (within a predetermined set). This is the process of determining the allocation amount.

Various criteria can be employed for determining the amount of residual interference margin to allocate. For example, assume that the allocation amount I _Remained,m (f) _(dBm) allocated to a predetermined group (predetermined set) is equally distributed to each communication device 20 within the predetermined group (predetermined set). In this case, the allocation amount to the communication device 20 is calculated by the following formula (10). Here, I _Remained,m,n (f) _(dBm) is the allocation amount to the n-th communication device 20 in group m.

Subsequently, the second determination unit 445 determines whether or not the processing of all groups has been completed (step S65). If the process has not ended (step S65: No), the second determination unit 445 returns the process to step S63. If the process has ended (step S65: Yes), the second determination unit 445 determines the adjustment amount of the operation parameter determined in step S2 (step S66).

For example, suppose the operating parameter determined in step S2 is the maximum allowable transmission power P _Tx,n (f) _(dBm) . At this time, the second determining unit 445 determines the adjustment amount α _n (f) _(dB) of the maximum allowable transmission power according to the following equation (11). The meaning of each parameter is the same as that shown in formulas (3), (4), and the like. n shown in equation (11) means the index of the communication device 20 as in equations (3) and (4).

After determining the adjustment amount, the control unit 44 of the communication control device ₄₀₁ returns to the communication control processing shown in FIG.

<4-3. Example of distribution processing>
The adjustment process described using FIGS. 12 and 13 can be easily applied when, for example, the communication devices 20 in the group adopt the same radio access scheme and can use a common interference avoidance technique. is. For example, it is assumed that the communication device 20 can use a technology such as LBT (Listen-Before-Talk). In this case, the communication device 20 performs an operation such as not transmitting when it detects radio waves from another communication device 20 . Therefore, from the viewpoint of the communication control device 40, the transmission power of the communication device 20 can be increased without worrying about interference within the group, so the adjustment processing described above can be easily applied.

Therefore, the communication control device 40 obtains information on the radio access schemes provided by the communication device 20, and based on the information, sequentially distributes so as to satisfy the required characteristics. As a required characteristic, for example, transmission power can be assumed. For example, initially, for convenience of primary system protection, the maximum allowable transmission power P _{MaxTx ,i} (f) _(dBm) lower than the desired transmission power P desired,i (f) _(dBm) of the i-th communication device 20 is set ( or determined). In such a case, the communication control device 40 uses the allocation amount I _Remained,m (f) _(dBm) of the residual interference margin to raise the maximum allowable transmission power to the initial desired transmission power or a magnitude close to it. becomes possible. Therefore, it is possible to rank such communication devices 20 in descending order of divergence and distribute the residual interference margin in that order. In this case, the following algorithm may be implemented.

FIG. 14 is a flowchart illustrating an example of allocation processing according to an embodiment of the present disclosure. An example of allocation processing will be described below with reference to the flowchart of FIG. The allocation process described below is executed, for example, in step S64 of the adjustment process shown in FIG.

First, the second determining unit 445 of the communication control device ₄₀₁ calculates the amount of deviation from the desired transmission power of each communication device 20 in the group (step S641). Here, assuming that the divergence amount of the i-th communication device 20 is ΔP _i , ΔP _i =P _MaxTx,i (f)−P _desired,i (f). P _MaxTx,i (f) is the maximum allowable transmit power before adjustment for the i-th communication device 20; Also, P _desired,i (f) is the desired transmission power of the i-th communication device 20 .

Subsequently, the second determining unit 445 sorts the communication devices 20 in descending order of deviation (step S642). Hereinafter, the index of the sorted communication device 20 is assumed to be i'. The second determining unit 445 then clears the variable i' (step S643). That is, i'=0.

Next, the second determination unit 445 calculates the allocation amount to the i'-th communication device 20 (step S644). Here, assuming that the allocation amount of the i'-th communication device 20 is I _increase,i' (f) _(dBm) , I _increase,i' (f) _(dBm) = ΔP _{i' (dBm)} -L _{p- i'(dB)} +G _Ant(dB) . ΔP _{i′ (dBm)} is the deviation amount of the i′-th communication device 20 and is a term corresponding to the adjustment amount α _i′ (f) _(dB) . L _{pi′ (dB)} is the propagation loss between the primary system and the i′-th communication device 20; G _{Ant (dB)} is the antenna gain of the primary system.

Next, the second determining unit 445 determines whether the total allocation exceeds the allocation amount to the group (step S645). For example, the second determination unit 445 determines whether I _Remained,m (f) _(dBm) −I _{increase,i′} (f) _(dBm) ≧0 is satisfied. In this step, I _Remained,m (f) _(dBm) means the remainder of the allocation amount of the residual interference margin allocated to group m.

If the total allocation exceeds the allocation amount to the group (step S645: Yes), the second determining unit 445 returns to the adjustment process shown in FIG.

If the total allocation does not exceed the allocation amount to the group (step S645: No), the second determining unit 445 determines the allocation amount for the i'-th communication device 20 (step S646). The second determining unit 445 may determine the allocation amount I _increase,i' (f) _(dBm) calculated in step S644 as the allocation amount for the i'-th communication device 20 as it is. Note that the second determination unit 445 determines an amount smaller than the allocation amount calculated in step S644 based on the information (for example, hardware configuration information and desired transmission power information) of the i'-th communication device 20. It may be determined as the allocation amount of the th communication device 20 .

Subsequently, the second determining unit 445 calculates the remainder of the residual interference margin allocation amount allocated to the group (step S647). For example, assume that the allocation amount I _increase,i' (f) _(dBm) calculated in step S644 is directly determined as the allocation amount for the i'-th communication device 20 in step S646. At this time, the second determination unit 445 sets I _Remained,m (f) _(dBm) =I _Remained,m (f) _(dBm) -I _increase,i' (f) _(dBm) . I _Remained,m (f) _(dBm) on the left side is the remainder of the allocation amount.

Subsequently, the second determination unit 445 increments i' (step S648). That is, the second determination unit 445 sets i'=i'+1. Then, the second determining unit 445 returns the process to step S644.

In this process, transmission power is assumed as a required characteristic. However, other required characteristics (for example, the Shannon capacity or the amount of interference between communication devices) can be substituted for the required characteristics. However, even when these are substituted, the allocation amount may be determined sequentially in descending order of deviation of the required characteristics. For example, assume that the required characteristic is substituted by the amount of interference between the communication devices 20 . In this case, the second determination unit 445 determines that the difference between the interference tolerance of the communication device 20 and the accumulation of interference (cumulative interference power) to the communication device 20 calculated with the transmission power before adjustment is large. A surplus interference margin is distributed to other communication devices 20 so that the amount of interference with the device 20 increases. Then, the second determining unit 445 adjusts the transmission power value of each communication device 20 based on the allocation result.

<4-4. Example of decision processing>
The second determining unit 445 may set the allocation amount of the residual interference margin determined based on the desired transmission power of the communication device 20 as the upper limit of the allocation amount. At this time, the second determining unit 445 may determine the transmission power of each communication device 20 as follows.

FIG. 15 is a flowchart illustrating an example of determination processing according to the embodiment of the present disclosure. An example of determination processing will be described below with reference to the flowchart of FIG. 15 . The determination process described below is executed, for example, in step S6 of the communication control process shown in FIG.

First, the second determining unit 445 determines the allocation amount to the communication device 20 based on any required characteristic (step S671). Then, the second determining unit 445 determines whether the transmission power (for example, the maximum allowable transmission power) derived from the allocation amount determined in step S671 exceeds the desired transmission power of the communication device 20 (step S672).

If not exceeded (step S672: Yes), the second determination unit 445 determines the allocation amount determined in step S671 as the allocation amount to be applied to the communication device 20 in question. Then, the second determining unit 445 determines the transmission power derived from the allocation amount as an operating parameter to be applied to the communication device 20 .

If it exceeds (step S<b>672 : No), the second determining unit 445 determines the desired transmission power of the communication device 20 as the operating parameter of the communication device 20 . Then, the second determining unit 445 applies the allocation amount based on the desired transmission power to the communication device 20 .

After the application is completed, the second determination unit 445 terminates the determination process.

<<5. Modification>>
The above-described embodiment is an example, and various modifications and applications are possible.

<5-1. Further information exchange between communication control devices>
In step S1 of the communication control process described above, the communication control device 40 exchanges information on the communication device 20 under its control with another communication control device 40 . At this time, the communication control device 40 may further exchange the following information (C1) to (C4) with another communication control device 40.

(C1) Information relating to grouping of communication devices This information can be exchanged when a plurality of communication control devices 40 exchange information necessary for calculation to perform distributed control of the communication devices 20 (hereinafter referred to as distributed control). For example, the communication control device 40 may exchange information indicating grouping criteria with other communication control devices 40 . Alternatively, the communication control device 40 may exchange the group information itself indicating the result of grouping with another communication control device 40 .

It should be noted that exchanging grouping information for all communication devices 20 increases overhead. Therefore, the communication control device 40 may, for example, transmit only information about a group including the communication device 20 managed by the other communication control device 40 to the other communication control device 40 .

FIG. 16 is a diagram showing a configuration example of a communication system 2 according to an embodiment of the present disclosure. In the example shown in FIG. 16, the communication system 2 includes a communication control device _40-3 and a communication control device _40-4 . The communication control device 40 ₃ manages the communication devices 20 ₆ , 20 ₇ and 20 ₈ . The communication control device 40 ₄ manages the communication devices 20 ₉ , 20 ₁₀ and 20 ₁₁ . The communication device 20 ₆ is classified into mutual interference group #3, the communication devices 20 ₇ to 20 ₉ are classified into mutual interference group #4, and the communication devices 20 ₁₀ to 20 ₁₁ are classified into mutual interference group #5. It is

At this time, the communication control devices _{40_3} and _{40_4} exchange only information about the mutual interference group #4. That is, the communication control device _40-3 notifies the communication control device _40-4 of only the information regarding mutual interference group #4. The communication control device _40-3 does not notify the communication control device _40-4 of information on the mutual interference group #3 that is unnecessary for the communication control device _40-4 . Similarly, the communication control unit ₄₀₄ notifies the communication control unit ₄₀₃ of only information on the mutual interference group #4. The communication control device _40-4 does not notify the communication control device _40-3 of the information on the mutual interference group #5 that is unnecessary for the communication control device _40-3 . As a result, the amount of information required for information exchange can be reduced.

(C2) Criteria for determining allocation amount of residual interference margin per group This information can be exchanged when a plurality of communication control apparatuses 40 perform distributed control.

(C3) Criteria for Determining Distribution Amount of Residual Interference Margin in Group This information can be exchanged when a plurality of communication control apparatuses 40 perform distributed control.

(C4) Distribution amount of residual interference margin and/or transmission power derived after distribution ) can be applied. Basically, it is desirable that this information be notified from the master to the slave. The slave controls the communication device 20 under its control based on this information.

<5-2. Collision Avoidance of Judgment Results Between Communication Control Devices>
It is assumed that the plurality of communication control devices 40 described above each determine the same operating parameters for a given communication device 20 . For example, in the example of FIG. 16, the communication control device 40 ₃ and the communication control device 40 ₄ set the same operating parameters for at least the three communication devices 20 (communication devices 20 ₇ to 20 ₉ ) belonging to the mutual interference group #4. to decide. However, in some cases, different determination results (transmission power after adjustment) are produced between the communication control apparatuses 40 . In this case, for example, a reset request (re-determination request) may be transmitted from one of the communication control devices 40 to the other communication control devices 40 regarding the communication devices 20 with different calculation results.

For example, in the example of FIG. 16, the transmission unit 446 of the communication control device _40-3 requests the communication control device _40-4 for the operation parameters determined by the second determination unit 445 of the communication control device _40-4 . Then, the acquisition unit 441 of the communication control device _40-3 acquires the operation parameters from the communication control device _40-4 . At this time, the operation parameters acquired by the communication control device _40-3 are the operation parameters of the communication devices 20 belonging to the group including the communication device 20 managed by the communication control device _40-4 among the communication devices 20 managed by the communication control device 40-3. may In the example of FIG. 16, the acquisition unit 441 of the communication control device 40 ₃ obtains the operation parameters of the three communication devices 20 (communication devices 20 ₇ to 20 ₉ ) belonging to the mutual interference group #4 from the communication control device 40 ₄ . may be obtained.

Then, the second determining unit 445 of the communication control device ₄₀₃ compares the operating parameters determined by itself with the operating parameters acquired from the communication control device ₄₀₄ . For example, the communication control unit 40 ₃ determines whether the operating parameters of the communication units 20 ₇ to 20 ₉ are different from the operating parameters determined by the communication control unit 40 ₃ .

Then, if the operating parameters are different, the transmission unit 446 of the communication control unit _40-3 transmits a reset request to the communication control unit _40-4 . Upon receiving the reset request, the second determination unit 445 of the communication control device 40 ₄ resets (redetermines) the operation parameters of the communication devices 20 (for example, the communication devices 20 ₇ to 20 ₉ ). At this time, the acquisition unit 441 of the communication control device ₄₀₄ acquires the operation parameters of the communication device 20 having different operation parameters among the operation parameters determined by the _second determination unit 445 of the communication control device 403. ₃ may be obtained. Then, the second determination unit 445 of the communication control device ₄₀₃ may determine the acquired operation parameter as the operation parameter of the communication device 20 as it is.

<5-3. Interference with Primary System to Consider>
So far, the explanation has been made assuming that the communication device 20 secondarily uses the same frequency as that of the primary system. However, it is conceivable that the protection of the primary system using not only the same frequency but also the adjacent frequency must be considered. In this case, the communication control device 40 may correct the calculation of the communication control process using parameters such as ACIR (Adjacent Channel Interference Ratio), ACLR (Adjacent Channel Leakage Ratio), and ACS (Adjacent Channel Selectivity). Also, the communication control unit 40 may utilize the blocking characteristics of the filters of the primary system.

<5-4. Including a communication device that interferes with a plurality of primary systems>
In the above embodiment, the number of primary systems to be protected (communication system 1) is one. However, situations can be envisioned in which one communication device 20 interferes with multiple primary systems. In such a case, the communication control device 40 adjusts the operating parameters (pre-adjusted operating (including quantity). That is, the control unit 44 (the first determination unit 442 to the second determination unit 445) of the communication control device 40 determines a plurality of operating parameters corresponding to a plurality of primary systems for one communication device 20. FIG. Then, the second determining unit 445 determines, as the operating parameter to be applied to the communication device 20 , the operating parameter that minimizes the output of the communication device 20 (for example, the lowest transmission power) among the plurality of operating parameters. At this time, the operating parameter may be an adjusted operating parameter or may be an adjustment amount of the operating parameter before adjustment. As a result, any cumulative interference to a plurality of primary systems can be made smaller than the allowable amount of interference.

At this time, the communication control device 40 may allocate the allocation amount of the residual interference margin associated with the operating parameter that was not selected as the residual interference margin to the other communication device 20 as it is. Then, the second determining unit 445 may determine the operating parameters of the other communication devices 20 based on the assigned allocation amount. At this time, the operating parameter may be an adjusted operating parameter or may be an adjustment amount of the operating parameter before adjustment. Further effective use of radio wave resources can be realized.

<5-5. When Communication Devices Belong to Multiple Mutual Interference Groups>
In the above embodiment, one communication device 20 was classified into one group as shown in FIG. However, as a result of grouping, one communication device 20 may belong to multiple groups. FIG. 17 is a diagram showing a configuration example of the communication system 2 according to the embodiment of the present disclosure. In the example shown in FIG. 17, the communication system 2 includes a communication device _20-12 , a communication device _20-13 , a communication device _20-14 , and a communication device _20-13 . The communication devices 20 ₁₂ to 20 ₁₃ are classified into mutual interference group #6, and the communication devices 20 ₁₃ to 20 ₁₅ are classified into mutual interference group #7. In the example of FIG. 17, the communication device ₂₀₁₃ belongs to two groups, mutual interference group #6 and mutual interference group #7.

Even in such a case, it is possible to allocate the residual interference margin by a method equivalent to the method shown in the adjustment process described above. Specifically, the second determining unit 445 determines the allocation amount of the residual interference margin for each of the plurality of groups with respect to the communication devices 20 belonging to the plurality of groups (hereinafter referred to as multiple belonging communication devices). For example, in the example of FIG. 17, assume that the second determination unit 445 determines the allocation amount of the communication device _2013. In the example of FIG. At this time, the second determining unit 445 executes the allocation process shown in _FIG . At the same time, the second determining unit 445 executes the allocation process shown in FIG. 14 for the mutual interference group #7 to determine the allocation amount to the communication device ₂₀₁₃ .

Then, the second determining unit 445 selects the smallest allocation amount among the plurality of allocation amounts as the allocation amount to the multiple belonging communication devices. For example, in the example of FIG. 17, the second determining unit 445 determines an allocation amount (hereinafter referred to as a first allocation amount) to the communication device 20 ₁₃ based on the residual interference margin allocated to the mutual interference group #6. ) and an allocation amount (hereinafter referred to as a second allocation amount) to the communication devices 20 _{to 13} based on the residual interference margin allocated to the mutual interference group #7, the smaller allocation amount of the communication device 20 ₁₃ as the allocation amount. Then, the second determining unit 445 determines operation parameters of the multiple-affiliated communication devices based on the selected allocation amount. At this time, the operating parameter may be an adjusted operating parameter or may be an adjustment amount of the operating parameter before adjustment. As a result, in any group, the cumulative interference between communication devices 20 within the group becomes smaller than the allowable amount of interference.

Also in this case, the unselected allocation amount (non-selected allocation amount) out of the plurality of allocation amounts may be allocated to the other communication device 20 as it is as the residual interference margin. For example, the unselected allocation amount may be allocated to other communication devices 20 within the target group (the group linked to the unselected allocation amount). For example, assume that the second allocation amount is selected as the allocation amount to the communication device ₂₀₁₃ in the example of FIG. In this case, the second determining unit 445 allocates the first allocation amount to the other communication device 20 (the communication device 20 ₁₂ and/or the communication device 20 ₁₄ ) belonging to the mutual interference group #6. Then, the second determining unit 445 may determine the operating parameters of the other communication devices 20 based on the assigned allocation amount. At this time, the operating parameter may be an adjusted operating parameter or may be an adjustment amount of the operating parameter before adjustment. Further effective use of radio wave resources can be realized.

<5-6. Modified Example of System Configuration>
The communication control device 40 of this embodiment is not limited to the devices described in the above embodiments. For example, the communication control device 40 may be a device having a function other than controlling the communication device 20 that secondary uses the frequency band in which frequency sharing is performed. For example, a network manager may have the functions of the communication control device 40 of the present embodiment. At this time, the network manager may be, for example, a C-BBU (Centralized Base Band Unit) of a network configuration called C-RAN (Centralized Radio Access Network) or a device having the same. Also, a base station (including an access point) may have the function of a network manager. These devices (such as network managers) can also be considered communication controllers.

In the above-described embodiment, the communication system 1 is the first wireless system, and the communication device 20 is the second wireless system. However, the first radio system and the second radio system are not limited to this example. For example, the first radio system may be a communication device (eg, communication device 10) and the second radio system may be a communication system (communication system 2). Note that the wireless system appearing in this embodiment is not limited to a system composed of a plurality of devices, and can be replaced with "device" and "terminal" as appropriate.

Further, in the above-described embodiment, the communication control device 40 is a device belonging to the communication system 2, but it does not necessarily have to be a device belonging to the communication system 2. FIG. The communication control device 40 may be a device external to the communication system 2 . The communication control device 40 may not directly control the communication device 20 but may indirectly control the communication device 20 via devices that constitute the communication system 2 . Also, a plurality of secondary systems (communication systems 2) may exist. At this time, the communication control device 40 may manage a plurality of secondary systems. In this case, each secondary system can be regarded as a second radio system.

Generally, in frequency sharing, the existing system using the target band is called the primary system, and the secondary user is called the secondary system, but the primary system and the secondary system may be replaced with different terms. A macro cell in HetNET (Heterogeneous Network) may be a primary system, and a small cell or a relay station may be a secondary system. Also, the base station may be the primary system, and the Relay UE and Vehicle UE that implement D2D and V2X (Vehicle-to-Everything) existing within the coverage of the base station may be the secondary system. The base station is not limited to a fixed type, and may be of a portable/mobile type.

Furthermore, the interface between each entity may be wired or wireless. For example, the interface between each entity (communication control device, communication device, or terminal device) appearing in this embodiment may be a radio interface that does not depend on frequency sharing. Radio interfaces that do not depend on frequency sharing include, for example, radio interfaces provided by mobile communication carriers via licensed bands, wireless LAN communication using existing unlicensed bands, and the like.

<5-7. Other modified examples>
A control device that controls the communication device 10, the communication device 20, the terminal device 30, or the communication control device 40 of the present embodiment may be realized by a dedicated computer system or by a general-purpose computer system. .

For example, a communication program for executing the above-described operations (e.g., communication control processing, adjustment processing, distribution processing, etc.) is stored in a computer-readable recording medium such as an optical disk, semiconductor memory, magnetic tape, flexible disk, etc. to distribute. Then, for example, the control device is configured by installing the program in a computer and executing the above-described processing. At this time, the control device may be a device (for example, a personal computer) external to the communication device 10, the communication device 20, the terminal device 30, or the communication control device 40. FIG. Also, the control device may be a device inside the communication device 10, the communication device 20, the terminal device 30, or the communication control device 40 (for example, the control unit 24, the control unit 34, or the control unit 44).

Further, the communication program may be stored in a disk device provided in a server device on a network such as the Internet, and may be downloaded to a computer. Also, the above-described functions may be realized by cooperation between an OS (Operating System) and application software. In this case, the parts other than the OS may be stored in a medium and distributed, or the parts other than the OS may be stored in a server device so that they can be downloaded to a computer.

Further, among the processes described in the above embodiments, all or part of the processes described as being automatically performed can be manually performed, or the processes described as being performed manually can be performed manually. All or part of this can also be done automatically by known methods. In addition, information including processing procedures, specific names, various data and parameters shown in the above documents and drawings can be arbitrarily changed unless otherwise specified. For example, the various information shown in each drawing is not limited to the illustrated information.

Also, each component of each device illustrated is functionally conceptual, and does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution and integration of each device is not limited to the illustrated one, and all or part of them can be functionally or physically distributed and integrated in arbitrary units according to various loads and usage conditions. Can be integrated and configured.

Further, the embodiments described above can be appropriately combined in areas where the processing contents are not inconsistent. Also, the order of the steps shown in the sequence diagrams or flowcharts of this embodiment can be changed as appropriate.

<<6. Conclusion>>
As described above, according to an embodiment of the present disclosure, the communication control device 40 determines the amount of adjustment of the operating parameters of the communication devices 20 belonging to a predetermined set based on the residual interference margin information. . In other words, the communication control device 40 distributes the residual interference margin to the communication device 20 to enable radio wave transmission with higher power. As a result, the communication device 20 can communicate with terminal devices located far away, or communicate with more terminal devices at once. As a result, the communication control device 40 can realize effective use of radio wave resources.

Further, the communication control device 40 classifies the plurality of communication devices 20 into one or more groups (collections). Then, the communication control device 40 allocates part or all of the residual interference margin to the predetermined set, and based on the information of the residual interference margin allocated to the predetermined set, the operating parameters of the communication devices 20 belonging to the predetermined set. determines the amount of adjustment for Thereby, the amount of calculation for determining the amount of adjustment of the operating parameter can be reduced.

If the group (aggregate) is a mutual interference group, the communication control device 40 can distribute the residual interference margin to each group without considering radio wave interference between groups. The communication control device 40 only needs to consider mutual interference between the communication devices 20 in the group when distributing the residual interference margin. Therefore, by making the group (set) a mutual interference group, the communication control device 40 can very easily determine the adjustment amount of the operating parameter.

Also, the communication control device 40 does not distribute the residual interference margin to the non-coordinable group (non-coordinateable set) and/or the non-coordinateable group (non-coordinateable set). Therefore, since the communication control device 40 does not waste the residual interference margin, it is possible to realize further effective use of radio wave resources.

Further, the communication control apparatus 40 allocates a large amount of interference to the communication apparatus 20 in descending order of the difference between the maximum allowable transmission power and the desired transmission power. That is, the communication control device 40 allocates the interference amounts in descending order of effect of the allocation of the interference amounts. As a result, the distribution efficiency of the residual interference margin is improved, so that the communication control device 40 can achieve further effective utilization of radio wave resources.

The embodiments of the present disclosure have been described above, but the technical scope of the present disclosure is not limited to the embodiments described above, and various modifications can be made without departing from the gist of the present disclosure. be. Moreover, you may combine the component over different embodiment and modifications suitably.

Further, the effects of each embodiment described in this specification are merely examples and are not limited, and other effects may be provided.

Note that the present technology can also take the following configuration.
(1)
an acquisition unit that acquires information of a plurality of second wireless systems that wirelessly communicate using radio waves in the frequency band used by the first wireless system;
A first determining, based on information of the plurality of second radio systems, operating parameters for radio wave transmission of each of the plurality of second radio systems so as to satisfy a protection standard for radio wave interference of the first radio system. a decision unit;
a calculation unit that calculates a residual interference amount that can be additionally allocated to the second radio system based on the operating parameter determined by the first determination unit and the protection criterion of the first radio system;
a classification unit that classifies the plurality of second wireless systems into one or more sets;
a second determination unit that determines an adjustment amount of the operating parameter of the second wireless system belonging to a predetermined set out of the one or more sets based on the residual interference amount information;
A communication control device comprising:
(2)
The second determination unit allocates part or all of the residual interference amount to the predetermined set, and based on information of the residual interference amount allocated to the predetermined set, the determining an amount of adjustment of the operating parameter of a second radio system;
The communication control device according to (1) above.
(3)
The classification unit classifies the plurality of second wireless systems into one or a plurality of groups based on whether or not the second wireless systems interfere with each other.
The communication control device according to (2) above.
(4)
The acquisition unit acquires coverage information regarding wireless communication coverage of each of the plurality of second wireless systems,
The classification unit classifies the plurality of second wireless systems into one or more sets based on the coverage information.
The communication control device according to (2) or (3) above.
(5)
Based on the coverage information, the classification unit identifies, from among the plurality of second radio systems, a second radio system on which the coverage overlaps, and classifies the identified second radio systems into the predetermined set. do,
The communication control device according to (4) above.
(6)
The acquisition unit acquires transmission power class information regarding transmission power classes of each of the plurality of second wireless systems,
The classification unit classifies the plurality of second wireless systems into one or more sets based on the transmission power class information.
The communication control device according to (2) or (3) above.
(7)
The classification unit identifies a second radio system of a predetermined transmission power class from among the plurality of second radio systems based on the transmission power class information, and classifies the identified second radio system in the predetermined transmission power class. sort into sets,
The communication control device according to (6) above.
(8)
classifying a plurality of second radio systems forming one cell among the plurality of second radio systems into the predetermined set;
The communication control device according to (2) or (3) above.
(9)
The second determining unit determines, from among the one or more sets, an unadjustable set in which all the second wireless systems belonging to it cannot adjust the operation parameters, and assigns the residual interference to the unadjustable set. allocating part or all of the residual interference amount to another set containing at least one of the second radio systems for which the operating parameters are adjustable without allocating an amount;
The communication control device according to any one of (2) to (8) above.
(10)
The acquisition unit acquires information about the hardware configuration of each of the second wireless systems,
The second determining unit determines, as an unadjustable set, a set in which all of the second wireless systems to which the operating parameters cannot be adjusted due to hardware configuration.
The communication control device according to (9) above.
(11)
The second determination unit determines, from the one or more sets, an adjustment-unnecessary set to which all of the second wireless systems belonging to which do not require adjustment of the operating parameters, and assigns the residual interference to the adjustment-unnecessary set. allocating part or all of the residual interference amount to another set containing at least one of the second radio systems for which the operating parameters are adjustable without allocating an amount;
The communication control device according to any one of (2) to (10).
(12)
The acquisition unit acquires information on desired transmission power of each of the second wireless systems,
The second determination unit determines a set in which all of the second wireless systems belonging thereto satisfy the desired transmission power as an adjustment-unnecessary set.
The communication control device according to (11) above.
(13)
The first determination unit calculates maximum allowable transmission power for each of the plurality of second wireless systems,
The second determining unit determines the predetermined set based on the magnitude of the deviation between the maximum allowable transmission power calculated by the first determining unit and the desired transmission power desired by the second radio system. determining the amount of adjustment of the operating parameter of the second radio system belonging to
The communication control device according to any one of (2) to (12).
(14)
The second determining unit assigns a larger amount of interference in descending order of the divergence to the second wireless systems belonging to the predetermined group, and determines the adjustment amount of the operating parameter based on the assigned amount of interference. ,
The communication control device according to (13) above.
(15)
When a predetermined second wireless system, which is one of the plurality of second wireless systems, belongs to a plurality of sets, the second determining unit determines the predetermined second wireless system for each of the plurality of sets. determining the allocation amount of the residual interference amount to the second radio system, selecting the smallest allocation amount from among the plurality of determined allocation amounts as the allocation amount to the predetermined second radio system, and based on the selected allocation amount to determine the amount of adjustment of the operating parameter of the predetermined second radio system;
The communication control device according to any one of (2) to (14).
(16)
The second determining unit allocates an unselected allocation amount among the plurality of allocation amounts to another second radio system, and determines the operation parameter of the other second radio system based on the allocated allocation amount. determining the amount of adjustment;
The communication control device according to (15) above.
(17)
The operating parameters determined by the determination unit of the first determination unit include maximum allowable transmission power, which is the maximum transmission power allowed for the second radio system,
The second determining unit determines the adjustment amount of the maximum allowable transmission power determined by the first determining unit.
The communication control device according to any one of (1) to (16) above.
(18)
a transmission unit configured to transmit to the second wireless system a second operating parameter including at least one of the adjustment amount determined by the second determination unit and the operation parameter adjusted by the adjustment amount;
The communication control device according to any one of (1) to (17) above.
(19)
The first radio system is a first communication system that uses radio waves in a predetermined frequency band,
The second radio system is a communication device provided in a second communication system that uses radio waves in the predetermined frequency band used by the first communication system,
The communication control device according to any one of (1) to (18).
(20)
The first communication system is a primary system that preferentially uses radio waves in the predetermined frequency band over the second communication system,
The second communication system is a secondary system that makes secondary use of radio waves in the frequency band used by the first communication system,
The communication control device according to (19) above.
(21)
Acquiring information of a plurality of second wireless systems that wirelessly communicate using radio waves in the frequency band used by the first wireless system;
Based on the information of the plurality of second radio systems, determining operating parameters for radio wave transmission of each of the plurality of second radio systems so as to satisfy a protection standard for radio wave interference of the first radio system;
calculating a residual interference amount additionally assignable to the second radio system based on the determined operating parameter and the protection criterion of the first radio system;
classifying the plurality of second wireless systems into one or more sets;
determining an adjustment amount of the operating parameter of the second radio system belonging to a predetermined set out of the one or more sets based on the residual interference amount information;
Communication control method.
(22)
a computer possessed by the communication control device,
an acquisition unit that acquires information of a plurality of second wireless systems that wirelessly communicate using radio waves in the frequency band used by the first wireless system;
A first determining, based on information of the plurality of second radio systems, operating parameters for radio wave transmission of each of the plurality of second radio systems so as to satisfy a protection standard for radio wave interference of the first radio system. decision part,
a calculation unit that calculates a residual interference amount that can be additionally allocated to the second radio system based on the operating parameter determined by the first determination unit and the protection criterion of the first radio system;
a classification unit that classifies the plurality of second wireless systems into one or more sets;
a second determining unit that determines an adjustment amount of the operating parameter of the second wireless system belonging to a predetermined set out of the one or more sets based on the residual interference amount information;
Communication control program to function as
(23)
A communication system comprising: a plurality of second radio systems that perform radio communication using radio waves in a frequency band used by a first radio system; and a communication control device that controls the plurality of second radio systems,
The communication control device is
an acquisition unit that acquires information on the plurality of second wireless systems;
A first determining, based on information of the plurality of second radio systems, operating parameters for radio wave transmission of each of the plurality of second radio systems so as to satisfy a protection standard for radio wave interference of the first radio system. a decision unit;
a calculation unit that calculates a residual interference amount that can be additionally allocated to the second radio system based on the operating parameter determined by the first determination unit and the protection criterion of the first radio system;
a classification unit that classifies the plurality of second wireless systems into one or more sets;
a second determining unit that determines an adjustment amount of the operating parameter of the second wireless system belonging to a predetermined set out of the one or more sets, based on the residual interference amount information;
Communications system.

1, 2 communication system 10, 20 communication device 30 terminal device 40 communication control device 21, 31, 41 wireless communication section 22, 32, 42 storage section 23, 43 network communication section 24, 34, 44 control section 211, 311 reception processing Units 212, 312 Transmission processing units 241, 441 Acquisition unit 242 Discrimination unit 243 Setting unit 244, 446 Transmission unit 442 First determination unit 443 Calculation unit 444 Classification unit 445 Second determination unit

Claims (20)

an acquisition unit that acquires information of a plurality of second wireless systems that wirelessly communicate using radio waves in the frequency band used by the first wireless system;
A first determining, based on information of the plurality of second radio systems, operating parameters for radio wave transmission of each of the plurality of second radio systems so as to satisfy a protection standard for radio wave interference of the first radio system. a decision unit;
a calculation unit that calculates a residual interference amount that can be additionally allocated to the second radio system based on the operating parameter determined by the first determination unit and the protection criterion of the first radio system;
a classification unit that classifies the plurality of second wireless systems into one or more sets;
a second determination unit that determines an adjustment amount of the operating parameter of the second wireless system belonging to a predetermined set out of the one or more sets based on the residual interference amount information;
A communication control device comprising: The second determination unit allocates part or all of the residual interference amount to the predetermined set, and based on information of the residual interference amount allocated to the predetermined set, the determining an amount of adjustment of the operating parameter of a second radio system;
The communication control device according to claim 1. The classification unit classifies the plurality of second wireless systems into one or a plurality of groups based on whether or not the second wireless systems interfere with each other.
3. The communication control device according to claim 2. The acquisition unit acquires coverage information regarding wireless communication coverage of each of the plurality of second wireless systems,
The classification unit classifies the plurality of second wireless systems into one or more sets based on the coverage information.
3. The communication control device according to claim 2. Based on the coverage information, the classification unit identifies, from among the plurality of second radio systems, a second radio system on which the coverage overlaps, and classifies the identified second radio systems into the predetermined set. do,
The communication control device according to claim 4. The acquisition unit acquires transmission power class information regarding transmission power classes of each of the plurality of second wireless systems,
The classification unit classifies the plurality of second wireless systems into one or more sets based on the transmission power class information.
3. The communication control device according to claim 2. The classification unit identifies a second radio system of a predetermined transmission power class from among the plurality of second radio systems based on the transmission power class information, and classifies the identified second radio system in the predetermined transmission power class. sort into sets,
The communication control device according to claim 6. classifying a plurality of second radio systems forming one cell among the plurality of second radio systems into the predetermined set;
3. The communication control device according to claim 2. The second determining unit determines, from among the one or more sets, an unadjustable set in which all the second wireless systems belonging to it cannot adjust the operation parameters, and assigns the residual interference to the unadjustable set. allocating part or all of the residual interference amount to another set containing at least one of the second radio systems for which the operating parameters are adjustable without allocating an amount;
3. The communication control device according to claim 2. The acquisition unit acquires information about the hardware configuration of each of the second wireless systems,
The second determining unit determines, as an unadjustable set, a set in which all of the second wireless systems to which the operating parameters cannot be adjusted due to hardware configuration.
The communication control device according to claim 9. The second determination unit determines, from the one or more sets, an adjustment-unnecessary set to which all of the second wireless systems belonging to which do not require adjustment of the operating parameters, and assigns the residual interference to the adjustment-unnecessary set. allocating part or all of the residual interference amount to another set containing at least one of the second radio systems for which the operating parameters are adjustable without allocating an amount;
3. The communication control device according to claim 2. The acquisition unit acquires information on desired transmission power of each of the second wireless systems,
The second determination unit determines a set in which all of the second wireless systems belonging thereto satisfy the desired transmission power as an adjustment-unnecessary set.
The communication control device according to claim 11. The first determination unit calculates maximum allowable transmission power for each of the plurality of second wireless systems,
The second determining unit determines the predetermined set based on the magnitude of the deviation between the maximum allowable transmission power calculated by the first determining unit and the desired transmission power desired by the second radio system. determining the amount of adjustment of the operating parameter of the second radio system belonging to
3. The communication control device according to claim 2. The second determining unit assigns a larger amount of interference in descending order of the divergence to the second wireless systems belonging to the predetermined group, and determines the adjustment amount of the operating parameter based on the assigned amount of interference. ,
The communication control device according to claim 13. When a predetermined second wireless system, which is one of the plurality of second wireless systems, belongs to a plurality of sets, the second determining unit determines the predetermined second wireless system for each of the plurality of sets. determining the allocation amount of the residual interference amount to the second radio system, selecting the smallest allocation amount from among the plurality of determined allocation amounts as the allocation amount to the predetermined second radio system, and based on the selected allocation amount to determine the amount of adjustment of the operating parameter of the predetermined second radio system;
3. The communication control device according to claim 2. The second determining unit allocates an unselected allocation amount among the plurality of allocation amounts to another second radio system, and determines the operation parameter of the other second radio system based on the allocated allocation amount. determining the amount of adjustment;
The communication control device according to claim 15. The operating parameters determined by the determination unit of the first determination unit include maximum allowable transmission power, which is the maximum transmission power allowed for the second radio system,
The second determining unit determines the adjustment amount of the maximum allowable transmission power determined by the first determining unit.
The communication control device according to claim 1. a transmission unit configured to transmit to the second wireless system a second operating parameter including at least one of the adjustment amount determined by the second determination unit and the operation parameter adjusted by the adjustment amount;
The communication control device according to claim 1. The first radio system is a first communication system that uses radio waves in a predetermined frequency band,
The second radio system is a communication device provided in a second communication system that uses radio waves in the predetermined frequency band used by the first communication system,
The communication control device according to claim 1. Acquiring information of a plurality of second wireless systems that wirelessly communicate using radio waves in the frequency band used by the first wireless system;
Based on the information of the plurality of second radio systems, determining operating parameters for radio wave transmission of each of the plurality of second radio systems so as to satisfy a protection standard for radio wave interference of the first radio system;
calculating a residual interference amount additionally assignable to the second radio system based on the determined operating parameter and the protection criterion of the first radio system;
classifying the plurality of second wireless systems into one or more sets;
determining an adjustment amount of the operating parameter of the second radio system belonging to a predetermined set out of the one or more sets based on the residual interference amount information;
Communication control method.

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